kernel/linux.git/drivers/base, branch v4.4.99

PM / wakeirq: report a wakeup_event on dedicated wekup irq

2017-11-08T09:06:28+00:00

[ Upstream commit 09bb6e93956ae5175b96905b723ec879c3ca0765 ] There are two reasons for reporting wakeup event when dedicated wakeup IRQ is triggered: - wakeup events accounting, so proper statistical data will be displayed in sysfs and debugfs; - there are small window when System is entering suspend during which dedicated wakeup IRQ can be lost: dpm_suspend_noirq() |- device_wakeup_arm_wake_irqs() |- dev_pm_arm_wake_irq(X) |- IRQ is enabled and marked as wakeup source [1]... |- suspend_device_irqs() |- suspend_device_irq(X) |- irqd_set(X, IRQD_WAKEUP_ARMED); |- wakup IRQ armed The wakeup IRQ can be lost if it's triggered at point [1] and not armed yet. Hence, fix above cases by adding simple pm_wakeup_event() call in handle_threaded_wake_irq(). Fixes: 4990d4fe327b (PM / Wakeirq: Add automated device wake IRQ handling) Signed-off-by: Grygorii Strashko Tested-by: Keerthy [ tony@atomide.com: added missing return to avoid warnings ] Tested-by: Tony Lindgren Signed-off-by: Tony Lindgren Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

driver core: platform: Don't read past the end of "driver_override" buffer

2017-10-12T09:27:32+00:00

commit bf563b01c2895a4bfd1a29cc5abc67fe706ecffd upstream. When printing the driver_override parameter when it is 4095 and 4094 bytes long, the printing code would access invalid memory because we need count+1 bytes for printing. Reject driver_override values of these lengths in driver_override_store(). This is in close analogy to commit 4efe874aace5 ("PCI: Don't read past the end of sysfs "driver_override" buffer") from Sasha Levin. Fixes: 3d713e0e382e ("driver core: platform: add device binding path 'driver_override'") Signed-off-by: Nicolai Stange Signed-off-by: Greg Kroah-Hartman

driver core: bus: Fix a potential double free

2017-09-13T21:09:44+00:00

commit 0f9b011d3321ca1079c7a46c18cb1956fbdb7bcb upstream. The .release function of driver_ktype is 'driver_release()'. This function frees the container_of this kobject. So, this memory must not be freed explicitly in the error handling path of 'bus_add_driver()'. Otherwise a double free will occur. Signed-off-by: Christophe JAILLET Signed-off-by: Greg Kroah-Hartman

PM / Domains: defer dev_pm_domain_set() until genpd->attach_dev succeeds if present

2017-08-07T02:19:42+00:00

commit 975e83cfb8dc16e7a2fdc58188c77c0c605876c2 upstream. If the genpd->attach_dev or genpd->power_on fails, genpd_dev_pm_attach may return -EPROBE_DEFER initially. However genpd_alloc_dev_data sets the PM domain for the device unconditionally. When subsequent attempts are made to call genpd_dev_pm_attach, it may return -EEXISTS checking dev->pm_domain without re-attempting to call attach_dev or power_on. platform_drv_probe then attempts to call drv->probe as the return value -EEXIST != -EPROBE_DEFER, which may end up in a situation where the device is accessed without it's power domain switched on. Fixes: f104e1e5ef57 (PM / Domains: Re-order initialization of generic_pm_domain_data) Signed-off-by: Sudeep Holla Acked-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

PM / Domains: Fix unsafe iteration over modified list of domain providers

2017-07-27T22:06:04+00:00

commit b556b15dc04e9b9b98790f04c21acf5e24f994b2 upstream. of_genpd_del_provider() iterates over list of domain provides and removes matching element thus it has to use safe version of list iteration. Fixes: aa42240ab254 (PM / Domains: Add generic OF-based PM domain look-up) Signed-off-by: Krzysztof Kozlowski Acked-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

PM / Domains: Fix unsafe iteration over modified list of device links

2017-07-27T22:06:04+00:00

commit c6e83cac3eda5f7dd32ee1453df2f7abb5c6cd46 upstream. pm_genpd_remove_subdomain() iterates over domain's master_links list and removes matching element thus it has to use safe version of list iteration. Fixes: f721889ff65a ("PM / Domains: Support for generic I/O PM domains (v8)") Signed-off-by: Krzysztof Kozlowski Acked-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

PM / QoS: return -EINVAL for bogus strings

2017-07-21T05:44:59+00:00

commit 2ca30331c156ca9e97643ad05dd8930b8fe78b01 upstream. In the current code, if the user accidentally writes a bogus command to this sysfs file, then we set the latency tolerance to an uninitialized variable. Fixes: 2d984ad132a8 (PM / QoS: Introcuce latency tolerance device PM QoS type) Signed-off-by: Dan Carpenter Acked-by: Pavel Machek Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

PM / wakeirq: Convert to SRCU

2017-07-21T05:44:59+00:00

commit ea0212f40c6bc0594c8eff79266759e3ecd4bacc upstream. The wakeirq infrastructure uses RCU to protect the list of wakeirqs. That breaks the irq bus locking infrastructure, which is allows sleeping functions to be called so interrupt controllers behind slow busses, e.g. i2c, can be handled. The wakeirq functions hold rcu_read_lock and call into irq functions, which in case of interrupts using the irq bus locking will trigger a might_sleep() splat. Convert the wakeirq infrastructure to Sleepable RCU and unbreak it. Fixes: 4990d4fe327b (PM / Wakeirq: Add automated device wake IRQ handling) Reported-by: Brian Norris Suggested-by: Paul E. McKenney Signed-off-by: Thomas Gleixner Reviewed-by: Paul E. McKenney Tested-by: Tony Lindgren Tested-by: Brian Norris Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

Add "shutdown" to "struct class".

2017-07-21T05:44:58+00:00

commit f77af15165847406b15d8f70c382c4cb15846b2a upstream. The TPM class has some common shutdown code that must be executed for all drivers. This adds some needed functionality for that. Signed-off-by: Josh Zimmerman Acked-by: Greg Kroah-Hartman Fixes: 74d6b3ceaa17 ("tpm: fix suspend/resume paths for TPM 2.0") Reviewed-by: Jarkko Sakkinen Tested-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: James Morris Signed-off-by: Greg Kroah-Hartman

driver core: platform: fix race condition with driver_override

2017-07-15T09:57:44+00:00

commit 6265539776a0810b7ce6398c27866ddb9c6bd154 upstream. The driver_override implementation is susceptible to race condition when different threads are reading vs storing a different driver override. Add locking to avoid race condition. Fixes: 3d713e0e382e ("driver core: platform: add device binding path 'driver_override'") Cc: stable@vger.kernel.org Signed-off-by: Adrian Salido Signed-off-by: Greg Kroah-Hartman