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Add cpuidle support for ARM Cirrus Logic CLPS711X CPUs.
This CPU has an unique internal register and write to this location
will put the system into the Idle State by halting the clock to the
processor until an interrupt is generated.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"A slighlty large fix for a subtle issue in the CPU hotplug code of
certain ARM SoCs, where the not yet online cpu needs to setup the cpu
local timer and needs to set the interrupt affinity to itself.
Setting interrupt affinity to a not online cpu is prohibited and
therefor the timer interrupt ends up on the wrong cpu, which leads to
nasty complications.
The SoC folks tried to hack around that in the SoC code in some more
than nasty ways. The proper solution is to have a way to enforce the
affinity setting to a not online cpu. The core patch to the genirq
code provides that facility and the follow up patches make use of it
in the GIC interrupt controller and the exynos timer driver.
The change to the core code has no implications to existing users,
except for the rename of the locked function and therefor the
necessary fixup in mips/cavium. Aside of that, no runtime impact is
possible, as none of the existing interrupt chips implements anything
which depends on the force argument of the irq_set_affinity()
callback"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource: Exynos_mct: Register clock event after request_irq()
clocksource: Exynos_mct: Use irq_force_affinity() in cpu bringup
irqchip: Gic: Support forced affinity setting
genirq: Allow forcing cpu affinity of interrupts
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are a few tty/serial fixes for 3.15-rc3 that resolve a number of
reported issues in the 8250 and samsung serial drivers, as well as a
character loss fix for the tty core that was caused by the lock
removal patches a release ago"
* tag 'tty-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial_core: fix uart PORT_UNKNOWN handling
serial: samsung: Change barrier() to cpu_relax() in console output
serial: samsung: don't check config for every character
serial: samsung: Use the passed in "port", fixing kgdb w/ no console
serial: 8250: Fix thread unsafe __dma_tx_complete function
8250_core: Fix unwanted TX chars write
tty: Fix race condition between __tty_buffer_request_room and flush_to_ldisc
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging / IIO driver fixes from Greg KH:
"Here are some small staging and IIO driver fixes for 3.15-rc3.
Nothing major at all, just some assorted issues that people have
reported"
* tag 'staging-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: comedi: usbdux: bug fix for accessing 'ao_chanlist' in private data
iio: adc: mxs-lradc: fix warning when buidling on avr32
iio: cm36651: Fix i2c client leak and possible NULL pointer dereference
iio: querying buffer scan_mask should return 0/1
staging:iio:ad2s1200 fix a missing break
iio: adc: at91_adc: correct default shtim value
ARM: at91: at91sam9260: change at91_adc name
ARM: at91: at91sam9g45: change at91_adc name
iio: cm32181: Fix read integration time function
iio: adc: at91_adc: Repair broken platform_data support
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a number of USB fixes for 3.15-rc3. The majority are gadget
fixes, as we didn't get any of those in for 3.15-rc2. The others are
all over the place, and there's a number of new device id addtions as
well."
* tag 'usb-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (35 commits)
usb: option: add and update a number of CMOTech devices
usb: option: add Alcatel L800MA
usb: option: add Olivetti Olicard 500
usb: qcserial: add Sierra Wireless MC7305/MC7355
usb: qcserial: add Sierra Wireless MC73xx
usb: qcserial: add Sierra Wireless EM7355
USB: io_ti: fix firmware download on big-endian machines
usb/xhci: fix compilation warning when !CONFIG_PCI && !CONFIG_PM
xhci: extend quirk for Renesas cards
xhci: Switch Intel Lynx Point ports to EHCI on shutdown.
usb: xhci: Prefer endpoint context dequeue pointer over stopped_trb
phy: core: make NULL a valid phy reference if !CONFIG_GENERIC_PHY
phy: fix kernel oops in phy_lookup()
phy: restore OMAP_CONTROL_PHY dependencies
phy: exynos: fix building as a module
USB: serial: fix sysfs-attribute removal deadlock
usb: wusbcore: fix panic in wusbhc_chid_set
usb: wusbcore: convert nested lock to use spin_lock instead of spin_lock_irq
uwb: don't call spin_unlock_irq in a USB completion handler
usb: chipidea: coordinate usb phy initialization for different phy type
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes from Rafael Wysocki:
"These include a fix for a recent ACPI regression related to device
notifications, intel_idle fix related to IvyTown support, fix for a
buffer size issue in ACPICA, PM core fix related to the "freeze" sleep
state, four fixes for various types of breakage in cpufreq drivers, a
PNP workaround for a wrong memory region size in ACPI tables, and a
fix and cleanup for the ACPI tools Makefile.
Specifics:
- Fix for broken ACPI notifications on some systems caused by a
recent ACPI hotplug commit that blocked the propagation of unknown
type notifications to device drivers inadvertently.
- intel_idle fix to make the IvyTown C-states handling (added
recently) work as intended which now is broken due to missing
braces. From Christoph Jaeger.
- ACPICA fix to make it allocate buffers of the right sizes for the
Generic Serial Bus operation region access. From Lv Zheng.
- PM core fix unblocking cpuidle before entering the "freeze" sleep
state which causes that state to be able to actually save more
energy than runtime idle.
- Configuration and build fixes for the highbank and powernv cpufreq
drivers from Kefeng Wang and Srivatsa S Bhat.
- Coccinelle warning fix related to error pointers for the unicore32
cpufreq driver from Duan Jiong.
- Integer overflow fix for the ppc-corenet cpufreq driver from Geert
Uytterhoeven.
- Workaround for BIOSes that don't report the entire Intel MCH area
in their ACPI tables from Bjorn Helgaas.
- ACPI tools Makefile fix and cleanup from Thomas Renninger"
* tag 'pm+acpi-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / notify: Do not block unknown type notifications in root handler
PNP: Work around BIOS defects in Intel MCH area reporting
cpufreq: highbank: fix ARM_HIGHBANK_CPUFREQ dependency warning
cpufreq: ppc: Fix integer overflow in expression
cpufreq, powernv: Fix build failure on UP
cpufreq: unicore32: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
PM / suspend: Make cpuidle work in the "freeze" state
intel_idle: fix IVT idle state table setting
ACPICA: Fix buffer allocation issue for generic_serial_bus region accesses.
tools/power/acpi: Minor bugfixes
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* pnp:
PNP: Work around BIOS defects in Intel MCH area reporting
* acpi-hotplug:
ACPI / notify: Do not block unknown type notifications in root handler
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- ltc2945: Don't unecessarily crash kernel on implementation error
- vexpress: Fix 'name' and 'label' attributes
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (ltc2945) Don't crash the kernel unnecessarily
hwmon: (vexpress) Avoid creating non-existing attributes
hwmon: (vexpress) Use legal hwmon device names
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a set of seven fixes, three (hpsa) and free'd command
references correcting bugs in the last round of updates and the
remaining four correcting problems within the SCSI error handler that
was causing a deadlock within USB"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
[SCSI] More USB deadlock fixes
[SCSI] Fix USB deadlock caused by SCSI error handling
[SCSI] Fix command result state propagation
[SCSI] Fix spurious request sense in error handling
[SCSI] don't reference freed command in scsi_prep_return
[SCSI] don't reference freed command in scsi_init_sgtable
[SCSI] hpsa: fix NULL dereference in hpsa_put_ctlr_into_performant_mode()
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"Since we didn't get around to collect fixes in time for -rc2 over the
easter vacation, this one is unfortunately a bit larger than we'd like
for an -rc3 merge.
A large set of the changes is in the device tree sources, so I'm
splitting out the description between code changes and DT changes.
Aside from omap and versatile express, the actual code bugs are and
trivial. Here is an overview:
imx:
- fix video clock settings
- fix one clock refcounting bug
omap:
- update defconfig for renamed USB PHY driver
- fix error handling in gpmc
- fix N900 video initialization regression
- fix reression in hwmod code from missing braces
- fix am43xx and omap3 clocks
- remove bogus write to voltage control register
pxa:
- fix build regression from 3.13 header cleanup
rockchip:
- fix a misleading printk string
shmobile:
- fix incorrect sound setting on multiple machines
spear:
- remove incorrect __init section annotation
tegra:
- remove a stale Kconfig entry
u300:
- update defconfig
ux500:
- enable common wireless and sensor drivers in defconfig
- more defconfig updates
vexpress:
- fix voltage calculation for opp
- fix reboot hang and warning
- fix out-of-bounds array access
- improve error handling in clock driver
overall:
- always select CLKSRC_OF in multiplatform builds
And these are the devicetree related changes:
imx:
- add missing #clock-cell properties
- fix pinctrl setting in imx6sl-evk
- fix video endpoint on imx53
- remove obsolete lvds-channel nodes (multiple patches)
- add missing second stmpe node
- fix usb host mode on dmo-edmqmx6 (multiple patches)
- fix gic node #address-cells to match usage
- add missing legacy IRQ map for PCIe
- fix microsom pincontrol setting for rgmii
- fix fatal typo in touchscreen DT usage for mx5
- list all RAM present on m53evk and mx53qsb
omap:
- fix bug in DT handling of gpmc external bus
- add DT for older revision of beagleboard
- fix regression after DT node name fixes
- remove obsolete properties for gpmc
- fix pinmux comment to match DT it refers to
- fix newly added dra7xx clock node data
- add missing clock for USB PHY
mvebu:
- add missing clock for mdio node
- fix nonstandard vendor prefixes on i2c nodes
rockchip:
- fix pin control setting for uart
shmobile:
- fix typo in DT data for pin control (multiple patches)
- fix gic node #address-cells to match usage
tegra:
- fix clock and uart DT representation to match hardware
zynq:
- add DT nodes for newly added driver
- add DT properties required for cpufreq-ondemand
overall:
- restore alphabetic order in Makefile
- grammar fixes in bindings"
* tag 'fixes-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (66 commits)
ARM: vexpress/TC2: Convert OPP voltage to uV before storing
power/reset: vexpress: Fix restart/power off operation
dt: tegra: remove non-existent clock IDs
clk: tegra: remove non-existent clocks
ARM: tegra: remove UART5/UARTE from tegra124.dtsi
ARM: tegra: remove TEGRA_EMC_SCALING_ENABLE
ARM: Tidy up DTB Makefile entries
ARM: fix missing CLKSRC_OF on multi-platform
ARM: spear: add __init to spear_clocksource_init()
ARM: pxa: hx4700.h: include "irqs.h" for PXA_NR_BUILTIN_GPIO
arm/mach-vexpress: array accessed out of bounds
clk: vexpress: NULL dereference on error path
ARM: OMAP2+: Fix GPMC remap for devices using an offset
ARM: zynq: dt: Add I2C nodes to Zynq device tree
ARM: zynq: DT: Add 'clock-latency' property
ARM: OMAP2+: Fix oops for GPMC free
ARM: dts: Add support for the BeagleBoard xM A/B
ARM: dts: Grammar /that will/it will/
ARM: dts: Grammar /is uses/ is used/
ARM: OMAP2+: Fix config name for USB3 PHY
...
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A number of older CMOTech modems are based on Qualcomm
chips. The blacklisted interfaces are QMI/wwan.
Reported-by: Lars Melin <larsm17@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Device interface layout:
0: ff/ff/ff - serial
1: ff/00/00 - serial AT+PPP
2: ff/ff/ff - QMI/wwan
3: 08/06/50 - storage
Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Device interface layout:
0: ff/ff/ff - serial
1: ff/ff/ff - serial AT+PPP
2: 08/06/50 - storage
3: ff/ff/ff - serial
4: ff/ff/ff - QMI/wwan
Cc: <stable@vger.kernel.org>
Reported-by: Julio Araujo <julio.araujo@wllctel.com.br>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cc: <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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During firmware download the device expects memory addresses in
big-endian byte order. As the wIndex parameter which hold the address is
sent in little-endian byte order regardless of host byte order, we need
to use swab16 rather than cpu_to_be16.
Also make sure to handle the struct ti_i2c_desc size parameter which is
returned in little-endian byte order.
Reported-by: Ludovic Drolez <ldrolez@debian.org>
Tested-by: Ludovic Drolez <ldrolez@debian.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When CONFIG_PCI and CONFIG_PM are not selected, xhci.c gets this
warning:
drivers/usb/host/xhci.c:409:13: warning: ‘xhci_msix_sync_irqs’ defined
but not used [-Wunused-function]
Instead of creating nested #ifdefs, this patch fixes it by defining the
xHCI PCI stubs as inline.
This warning has been in since 3.2 kernel and was
caused by commit 421aa841a134f6a743111cf44d0c6d3b45e3cf8c
"usb/xhci: hide MSI code behind PCI bars", but wasn't noticed
until 3.13 when a configuration with these options was tried
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Cc: stable@vger.kernel.org # 3.2
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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After suspend another Renesas PCI-X USB 3.0 card doesn't work.
[root@fedora-20 ~]# lspci -vmnnd 1912:
Device: 03:00.0
Class: USB controller [0c03]
Vendor: Renesas Technology Corp. [1912]
Device: uPD720202 USB 3.0 Host Controller [0015]
SVendor: Renesas Technology Corp. [1912]
SDevice: uPD720202 USB 3.0 Host Controller [0015]
Rev: 02
ProgIf: 30
This patch should be applied to stable kernel 3.14 that contain
the commit 1aa9578c1a9450fb21501c4f549f5b1edb557e6d
"xhci: Fix resume issues on Renesas chips in Samsung laptops"
Reported-and-tested-by: Anatoly Kharchenko <rfr-bugs@yandex.ru>
Reference: http://redmine.russianfedora.pro/issues/1315
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Cc: stable@vger.kernel.org # 3.14
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The same issue like with Panther Point chipsets. If the USB ports are
switched to xHCI on shutdown, the xHCI host will send a spurious interrupt,
which will wake the system. Some BIOS have work around for this, but not all.
One example is Compulab's mini-desktop, the Intense-PC2.
The bug can be avoided if the USB ports are switched back to EHCI on
shutdown.
This patch should be backported to stable kernels as old as 3.12,
that contain the commit 638298dc66ea36623dbc2757a24fc2c4ab41b016
"xhci: Fix spurious wakeups after S5 on Haswell"
Signed-off-by: Denis Turischev <denis@compulab.co.il>
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We have observed a rare cycle state desync bug after Set TR Dequeue
Pointer commands on Intel LynxPoint xHCs (resulting in an endpoint that
doesn't fetch new TRBs and thus an unresponsive USB device). It always
triggers when a previous Set TR Dequeue Pointer command has set the
pointer to the final Link TRB of a segment, and then another URB gets
enqueued and cancelled again before it can be completed. Further
investigation showed that the xHC had returned the Link TRB in the TRB
Pointer field of the Transfer Event (CC == Stopped -- Length Invalid),
but when xhci_find_new_dequeue_state() later accesses the Endpoint
Context's TR Dequeue Pointer field it is set to the first TRB of the
next segment.
The driver expects those two values to be the same in this situation,
and uses the cycle state of the latter together with the address of the
former. This should be fine according to the XHCI specification, since
the endpoint ring should be stopped when returning the Transfer Event
and thus should not advance over the Link TRB before it gets restarted.
However, real-world XHCI implementations apparently don't really care
that much about these details, so the driver should follow a more
defensive approach to try to work around HC spec violations.
This patch removes the stopped_trb variable that had been used to store
the TRB Pointer from the last Transfer Event of a stopped TRB. Instead,
xhci_find_new_dequeue_state() now relies only on the Endpoint Context,
requiring a small amount of additional processing to find the virtual
address corresponding to the TR Dequeue Pointer. Some other parts of the
function were slightly rearranged to better fit into this model.
This patch should be backported to kernels as old as 2.6.31 that contain
the commit ae636747146ea97efa18e04576acd3416e2514f5 "USB: xhci: URB
cancellation support."
Signed-off-by: Julius Werner <jwerner@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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While porting a RS485 driver from 2.6.29 to 3.14, i noticed that the serial tty
driver could break it by using uart ports that it does not own :
1. uart_change_pm ist called during uart_open and calls the uart pm function
without checking for PORT_UNKNOWN.
The fix is to move uart_change_pm from uart_open to uart_port_startup.
2. The return code from the uart request_port call in uart_set_info is not
handled properly, leading to the situation that the serial driver also
thinks it owns the uart ports.
This can triggered by doing following actions :
setserial /dev/ttyS0 uart none # release the uart ports
modprobe lirc-serial # or any other device that uses the uart
setserial /dev/ttyS0 uart 16550 # gives no error and the uart tty driver
# can use the ports as well
Signed-off-by: Thomas Pfaff <tpfaff@pcs.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The two functions to write out to the console (one used in normal
console mode and one in polling console mode) were slightly different.
One used a barrier() in its loop and the other a cpu_relax(). The
barrier() really doesn't do anything since we're using rd_regl() to
read the port anyway. Switch it to cpu_relax() to make things
consistent.
No known bugs / issues are fixed by this change--it just makes things
more consistent.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The s3c24xx_serial_console_putchar() is _only_ ever used by
s3c24xx_serial_console_write() and is called in a loop (indirectly
through uart_console_write()). There's no reason to call
s3c24xx_port_configured() for every iteration through the loop. Move
it outside the loop.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The two functions in the samsung serial driver used for writing
characters out to the port were inconsistent about whether they used
the passed in "port" or the global "cons_uart". There was no reason
to use the global and the use of the global in
s3c24xx_serial_put_poll_char() caused a crash in the case where you
used the serial port for kgdboc but not for console.
Fix it so we used the passed in variable.
Note that this doesn't fix all problems with the samsung serial
driver. Specifically:
* s3c24xx_serial_console_putchar() is still 99% identical to
s3c24xx_serial_put_poll_char() (the function signature is different,
but that's about it). A future patch will make them slightly less
identical and judging by other serial drivers we may need yet more
differences eventually.
* The samsung serial driver still doesn't allow you to have more than
one console port since it still uses the global cons_uart in
s3c24xx_serial_console_write().
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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__dma_tx_complete is not protected against concurrent
call of serial8250_tx_dma. it can lead to circular tail
index corruption or parallel call of serial_tx_dma on the
same data portion.
This patch fixes this issue by holding the port lock.
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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On transmit-hold-register empty, serial8250_tx_chars
should be called only if we don't use DMA.
DMA has its own tx cycle.
Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The race was introduced while development of linux-3.11 by
e8437d7ecbc50198705331449367d401ebb3181f and
e9975fdec0138f1b2a85b9624e41660abd9865d4.
Originally it was found and reproduced on linux-3.12.15 and
linux-3.12.15-rt25, by sending 500 byte blocks with 115kbaud to the
target uart in a loop with 100 milliseconds delay.
In short:
1. The consumer flush_to_ldisc is on to remove the head tty_buffer.
2. The producer adds a number of bytes, so that a new tty_buffer must
be allocated and added by __tty_buffer_request_room.
3. The consumer removes the head tty_buffer element, without handling
newly committed data.
Detailed example:
* Initial buffer:
* Head, Tail -> 0: used=250; commit=250; read=240; next=NULL
* Consumer: ''flush_to_ldisc''
* consumed 10 Byte
* buffer:
* Head, Tail -> 0: used=250; commit=250; read=250; next=NULL
{{{
count = head->commit - head->read; // count = 0
if (!count) { // enter
// INTERRUPTED BY PRODUCER ->
if (head->next == NULL)
break;
buf->head = head->next;
tty_buffer_free(port, head);
continue;
}
}}}
* Producer: tty_insert_flip_... 10 bytes + tty_flip_buffer_push
* buffer:
* Head, Tail -> 0: used=250; commit=250; read=250; next=NULL
* added 6 bytes: head-element filled to maximum.
* buffer:
* Head, Tail -> 0: used=256; commit=250; read=250; next=NULL
* added 4 bytes: __tty_buffer_request_room is called
* buffer:
* Head -> 0: used=256; commit=256; read=250; next=1
* Tail -> 1: used=4; commit=0; read=250 next=NULL
* push (tty_flip_buffer_push)
* buffer:
* Head -> 0: used=256; commit=256; read=250; next=1
* Tail -> 1: used=4; commit=4; read=250 next=NULL
* Consumer
{{{
count = head->commit - head->read;
if (!count) {
// INTERRUPTED BY PRODUCER <-
if (head->next == NULL) // -> no break
break;
buf->head = head->next;
tty_buffer_free(port, head);
// ERROR: tty_buffer head freed -> 6 bytes lost
continue;
}
}}}
This patch reintroduces a spin_lock to protect this case. Perhaps later
a lock-less solution could be found.
Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Cc: stable <stable@vger.kernel.org> # 3.11
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.linaro.org/people/pawel.moll/linux into fixes
ARM Versatile Express fixes for 3.15
This series contains straight-forward fixes for different
Versatile Express infrastructure drivers:
- NULL pointer dereference on the error path in the clk driver
- out of boundary array access in the dcscb driver
- broken restart/power off implementation
- mis-interpreted voltage unit in the spc driver
* tag 'vexpress/fixes-for-3.15' of git://git.linaro.org/people/pawel.moll/linux:
ARM: vexpress/TC2: Convert OPP voltage to uV before storing
power/reset: vexpress: Fix restart/power off operation
arm/mach-vexpress: array accessed out of bounds
clk: vexpress: NULL dereference on error path
Includes an update to 3.15-rc2
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The kernel oopses in phy_lookup() due to 'phy->init_data' being NULL if we
register PHYs from a device tree probing driver and then call phy_get() on a
device that has no representation in the device tree (e.g. a PCI device).
Checking the pointer before dereferening it and skipping an interation if
it's NULL prevents this kernel oops.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When OMAP_CONTROL_USB was renamed to OMAP_CONTROL_PHY (commit
14da699b), its dependencies were lost in the process. Nothing in the
commit message indicates that this removal was intentional, so I think
it was by accident and the dependencies should be restored.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Roger Quadros <rogerq@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The top-level phy-samsung-usb2 driver may be configured as a
loadable module, which currently causes link errors because
of the dependency on the exynos{5250,4x12,4210}_usb2_phy_config
symbol. Solving this could be achieved by exporting these
symbols, but as the SoC-specific parts of the driver are not
currently built as modules, it seems better to just link
everything into one module and avoid the need for the export.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fix driver new_id sysfs-attribute removal deadlock by making sure to
not hold any locks that the attribute operations grab when removing the
attribute.
Specifically, usb_serial_deregister holds the table mutex when
deregistering the driver, which includes removing the new_id attribute.
This can lead to a deadlock as writing to new_id increments the
attribute's active count before trying to grab the same mutex in
usb_serial_probe.
The deadlock can easily be triggered by inserting a sleep in
usb_serial_deregister and writing the id of an unbound device to new_id
during module unload.
As the table mutex (in this case) is used to prevent subdriver unload
during probe, it should be sufficient to only hold the lock while
manipulating the usb-serial driver list during deregister. A racing
probe will then either fail to find a matching subdriver or fail to get
the corresponding module reference.
Since v3.15-rc1 this also triggers the following lockdep warning:
======================================================
[ INFO: possible circular locking dependency detected ]
3.15.0-rc2 #123 Tainted: G W
-------------------------------------------------------
modprobe/190 is trying to acquire lock:
(s_active#4){++++.+}, at: [<c0167aa0>] kernfs_remove_by_name_ns+0x4c/0x94
but task is already holding lock:
(table_lock){+.+.+.}, at: [<bf004d84>] usb_serial_deregister+0x3c/0x78 [usbserial]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (table_lock){+.+.+.}:
[<c0075f84>] __lock_acquire+0x1694/0x1ce4
[<c0076de8>] lock_acquire+0xb4/0x154
[<c03af3cc>] _raw_spin_lock+0x4c/0x5c
[<c02bbc24>] usb_store_new_id+0x14c/0x1ac
[<bf007eb4>] new_id_store+0x68/0x70 [usbserial]
[<c025f568>] drv_attr_store+0x30/0x3c
[<c01690e0>] sysfs_kf_write+0x5c/0x60
[<c01682c0>] kernfs_fop_write+0xd4/0x194
[<c010881c>] vfs_write+0xbc/0x198
[<c0108e4c>] SyS_write+0x4c/0xa0
[<c000f880>] ret_fast_syscall+0x0/0x48
-> #0 (s_active#4){++++.+}:
[<c03a7a28>] print_circular_bug+0x68/0x2f8
[<c0076218>] __lock_acquire+0x1928/0x1ce4
[<c0076de8>] lock_acquire+0xb4/0x154
[<c0166b70>] __kernfs_remove+0x254/0x310
[<c0167aa0>] kernfs_remove_by_name_ns+0x4c/0x94
[<c0169fb8>] remove_files.isra.1+0x48/0x84
[<c016a2fc>] sysfs_remove_group+0x58/0xac
[<c016a414>] sysfs_remove_groups+0x34/0x44
[<c02623b8>] driver_remove_groups+0x1c/0x20
[<c0260e9c>] bus_remove_driver+0x3c/0xe4
[<c026235c>] driver_unregister+0x38/0x58
[<bf007fb4>] usb_serial_bus_deregister+0x84/0x88 [usbserial]
[<bf004db4>] usb_serial_deregister+0x6c/0x78 [usbserial]
[<bf005330>] usb_serial_deregister_drivers+0x2c/0x4c [usbserial]
[<bf016618>] usb_serial_module_exit+0x14/0x1c [sierra]
[<c009d6cc>] SyS_delete_module+0x184/0x210
[<c000f880>] ret_fast_syscall+0x0/0x48
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(table_lock);
lock(s_active#4);
lock(table_lock);
lock(s_active#4);
*** DEADLOCK ***
1 lock held by modprobe/190:
#0: (table_lock){+.+.+.}, at: [<bf004d84>] usb_serial_deregister+0x3c/0x78 [usbserial]
stack backtrace:
CPU: 0 PID: 190 Comm: modprobe Tainted: G W 3.15.0-rc2 #123
[<c0015e10>] (unwind_backtrace) from [<c0013728>] (show_stack+0x20/0x24)
[<c0013728>] (show_stack) from [<c03a9a54>] (dump_stack+0x24/0x28)
[<c03a9a54>] (dump_stack) from [<c03a7cac>] (print_circular_bug+0x2ec/0x2f8)
[<c03a7cac>] (print_circular_bug) from [<c0076218>] (__lock_acquire+0x1928/0x1ce4)
[<c0076218>] (__lock_acquire) from [<c0076de8>] (lock_acquire+0xb4/0x154)
[<c0076de8>] (lock_acquire) from [<c0166b70>] (__kernfs_remove+0x254/0x310)
[<c0166b70>] (__kernfs_remove) from [<c0167aa0>] (kernfs_remove_by_name_ns+0x4c/0x94)
[<c0167aa0>] (kernfs_remove_by_name_ns) from [<c0169fb8>] (remove_files.isra.1+0x48/0x84)
[<c0169fb8>] (remove_files.isra.1) from [<c016a2fc>] (sysfs_remove_group+0x58/0xac)
[<c016a2fc>] (sysfs_remove_group) from [<c016a414>] (sysfs_remove_groups+0x34/0x44)
[<c016a414>] (sysfs_remove_groups) from [<c02623b8>] (driver_remove_groups+0x1c/0x20)
[<c02623b8>] (driver_remove_groups) from [<c0260e9c>] (bus_remove_driver+0x3c/0xe4)
[<c0260e9c>] (bus_remove_driver) from [<c026235c>] (driver_unregister+0x38/0x58)
[<c026235c>] (driver_unregister) from [<bf007fb4>] (usb_serial_bus_deregister+0x84/0x88 [usbserial])
[<bf007fb4>] (usb_serial_bus_deregister [usbserial]) from [<bf004db4>] (usb_serial_deregister+0x6c/0x78 [usbserial])
[<bf004db4>] (usb_serial_deregister [usbserial]) from [<bf005330>] (usb_serial_deregister_drivers+0x2c/0x4c [usbserial])
[<bf005330>] (usb_serial_deregister_drivers [usbserial]) from [<bf016618>] (usb_serial_module_exit+0x14/0x1c [sierra])
[<bf016618>] (usb_serial_module_exit [sierra]) from [<c009d6cc>] (SyS_delete_module+0x184/0x210)
[<c009d6cc>] (SyS_delete_module) from [<c000f880>] (ret_fast_syscall+0x0/0x48)
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If no valid CHID value has previously been set on an HWA, writing a
value of all zeros will cause a kernel panic in uwb_radio_stop because
wusbhc->uwb_rc has not been set. This patch skips the call to
uwb_radio_stop if wusbhc->uwb_rc has not been initialized.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Nesting a spin_lock_irq/unlock_irq inside a lock that has already
disabled interrupts will enable interrupts before we are ready when
spin_unlock_irq is called. This patch converts the inner lock to use
spin_lock and spin_unlock instead.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch converts the use of spin_lock_irq/spin_unlock_irq to
spin_lock_irqsave/spin_unlock_irqrestore in uwb_rc_set_drp_cmd_done
which is called from a USB completion handler. There are also
whitespace cleanups to make checkpatch.pl happy.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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For internal PHY (like UTMI), the phy clock may from internal pll,
it is on/off on the fly, the access PORTSC.PTS will hang without
phy clock. So, the usb_phy_init which will open phy clock needs to
be called before hw_phymode_configure.
See: http://marc.info/?l=linux-arm-kernel&m=139350618732108&w=2
For external PHY (like ulpi), it needs to configure portsc.pts before
visit viewport, or the viewport can't be visited. so phy_phymode_configure
needs to be called before usb_phy_init.
See: cd0b42c2a6d2a74244f0053f8960f5dad5842278
It may not the best solution, but it can work for all situations.
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Chris Ruehl <chris.ruehl@gtsys.com.hk>
Cc: shc_work@mail.ru
Cc: denis@eukrea.com
Cc: festevam@gmail.com
Cc: stable <stable@vger.kernel.org> # 3.14
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v3.15-rc3
Quite a few fixes this time since I lost v3.15-rc2
window.
Most fixes are MUSB which learned to remove its debugfs directories
properly, got a fix for PHY handling and now knows that it should
make sure its clocks aren't gated before trying to access registers.
ffs got a race fix between ffs_epfile_io() and ffs_func_eps_disable().
dwc3 got a fix for system suspend/resume and now only iterates over
valid endpoints when trying to resize TX fifos.
usb_get_phy() now will properly return an error if try_module_get() fails.
We also have a revert for a NAPI conversion on the ethernet gadget which
was causing a kernel BUG.
Signed-of-by: Felipe Balbi <balbi@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"A couple of things here:
- Fixes for pbias that didn't make it in during the merge window due
to the driver coming in via MMC. The conversion to use helpers is
a fix as it implements list_voltage() which the main user (MMC)
relies on for correct functioning.
- Change the !REGULATOR stub for optional regulators to return an
error rather than a dummy; this is more in keeping with the
intended use of optional regulators and fixes some issues seen MMC
where it got confused by a dummy being provided"
* tag 'regulator-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: core: Return error in get optional stub
regulator: pbias: Convert to use regmap helper functions
regulator: pbias: Fix is_enabled callback implementation
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few driver specific fixes here:
- SH HSPI was dealing with its clocks incorrectly which meant it
didn't work on some SoCs, fixing this also requires a small fix to
one of the SoC clock trees to avoid breaking existing users.
- The SiRF driver appears to have had several quality problems, it's
fairly new and not widely used so this isn't too worrying.
- A brute force fix for excessive locking in the Atmel driver, it
needs further investigation but this deals with the immediate
issue.
- A build fix for the Blackfin driver"
* tag 'spi-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: atmel: Fix scheduling while atomic bug
spi: sh-hspi: Do not specifically request shyway_clk clock
ARM: shmobile: r8a7778: Use clks as MSTP007 parent
spi: sirf: make GPIO chipselect function work well
spi: sirf: set SPI controller in RISC IO chipselect mode
spi: sirf: correct TXFIFO empty interrupt status bit
spi: bfin5xx: fix build error
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Commit 1a699476e258 "ACPI / hotplug / PCI: Hotplug notifications from
acpi_bus_notify()" changed the root notify handler, acpi_bus_notify(),
to block unknown type norifications, but it overlooked the fact that
they might be propagated to drivers via the ->notify() callback.
Fix the problem by allowing drivers to receive unknown type
notifications via ->notify() as before.
Fixes: 1a699476e258 (ACPI / hotplug / PCI: Hotplug notifications from acpi_bus_notify())
Reported-and-tested-by: Mantas Mikulėnas <grawity@gmail.com>
Reported-and-tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Dan updated tag allocation to accomodate devices which choke when tags
jump back and forth. Quite a few ahci MSI related fixes. A couple
config dependency fixes and other misc fixes"
* 'for-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata/ahci: accommodate tag ordered controllers
ahci: Do not receive interrupts sent by dummy ports
ahci: Use pci_enable_msi_exact() instead of pci_enable_msi_range()
ahci: Ensure "MSI Revert to Single Message" mode is not enforced
ahci: do not request irq for dummy port
pata_samsung_cf: fix ata_host_activate() failure handling
pata_arasan_cf: fix ata_host_activate() failure handling
ata: fix i.MX AHCI driver dependencies
pata_at91: fix ata_host_activate() failure handling
libata: Update queued trim blacklist for M5x0 drives
libata: make AHCI_XGENE depend on PHY_XGENE
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The restart/power off implementation in the vexpress driver
used to obtain the config function when necessary. This was
wrong in two respects:
1. It required memory allocation with disabled interrupts
(it worked, but lockdep - when enabled - reported warnings).
2. Used jiffies-based timeout, while jiffies are not running
at this stage of system shutdown (therefore a config
transaction error - if happened - would have never be reported).
Fixed by pre-allocating the config function per device
and using mdelay for timeout.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
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The Tegra124 clock driver currently provides 3 clocks that don't actually
exist; 2 for NAND and one for UART5/UARTE. Delete these.
Cc: <stable@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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An implementation error should not crash the kernel if it is avoidable.
Replace BUG() with WARN_ONCE().
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The 'label' attribute was always created but returned -ENOENT
if there is no label and such behaviour is undefined from
libsensors' point of view.
Fixed by providing is_visible method in the attributes group,
so the attribute is not created at all when unnecessary.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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The driver used to directly us a DT 'compatible' property for
the 'name' attribute of the hwmon devices. Unfortunately it
contains '-' which is illegal in this context. It messes up
libsensors and thus every application using it.
Fixed by providing equivalent (and simpler) name strings.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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If the allocation fails then we dereference the NULL in the error path.
Just return directly.
Fixes: ed27ff1db869 ('clk: Versatile Express clock generators ("osc") driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
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Work around BIOSes that don't report the entire Intel MCH area.
MCHBAR is not an architected PCI BAR, so MCH space is usually reported as a
PNP0C02 resource. The MCH space was once 16KB, but is 32KB in newer parts.
Some BIOSes still report a PNP0C02 resource that is only 16KB, which means
the rest of the MCH space is consumed but unreported.
This can cause resource map sanity check warnings or (theoretically) a
device conflict if we assigned the unreported space to another device.
The Intel perf event uncore driver tripped over this when it claimed the
MCH region:
resource map sanity check conflict: 0xfed10000 0xfed15fff 0xfed10000 0xfed13fff pnp 00:01
Info: mapping multiple BARs. Your kernel is fine.
To prevent this, if we find a PNP0C02 resource that covers part of the MCH
space, extend it to cover the entire space.
References: http://lkml.kernel.org/r/20140224162400.GE16457@pd.tnic
Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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In usbdux_ao_cmd(), the channels for the command are transfered from the
cmd->chanlist and stored in the private data 'ao_chanlist'. The channel
numbers are bit-shifted when stored so that they become the "command"
that is transfered to the device. The channel to command conversion
results in the 'ao_chanlist' having these values for the channels:
channel 0 -> ao_chanlist = 0x00
channel 1 -> ao_chanlist = 0x40
channel 2 -> ao_chanlist = 0x80
channel 3 -> ao_chanlist = 0xc0
The problem is, the usbduxsub_ao_isoc_irq() function uses the 'chan' value
from 'ao_chanlist' to access the 'ao_readback' array in the private data.
So instead of accessing the array as 0, 1, 2, 3, it accesses it as 0x00,
0x40, 0x80, 0xc0.
Fix this by storing the raw channel number in 'ao_chanlist' and doing the
bit-shift when creating the command.
Fixes: a998a3db530bff80 "staging: comedi: usbdux: cleanup the private data 'outBuffer'"
Cc: stable <stable@vger.kernel.org> # 3.12
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Acked-by: Bernd Porr <mail@berndporr.me.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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