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This patch adds support for the Omega-PCI, an 8-port asynchronous
multiport adapter for computers with PCI bus [1].
[1] http://www.cronyx.ru/hardware/ompci.html
Signed-off-by: Antony Pavlov <antony@niisi.msk.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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When a break is received, Tegra's UART apparently fills the FIFO with
0 bytes. These must be drained so that they aren't interpreted as actual
data received. This allows e.g. MAGIC_SYSRQ to work on Tegra's UARTs.
v2: Added FIXME comment to clear_rx_fifo
Originally-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Tegra's UART is currently auto-detected as PORT_XSCALE due to register
bit UART_IER.UUE being writable. However, the Tegra documentation states
that this register bit is reserved. Hence, we should not program it.
Instead, the documentation specifies that the UART is 16550 compatible.
However, Tegra does need register bit UART_IER.RTOIE set, which is not
enabled by any 16550 port type. This was not noticed before, since
PORT_XSCALE enables CAP_UUE, which conflates both UUE and RTOIE bit
programming.
This change defines PORT_TEGRA that doesn't set UART_CAP_UUE, but does
set UART_CAP_RTOIE, which is a new capability indicating that the RTOIE
bit needs to be enabled.
Based-on-code-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The n_tracerouter and n_tracesink line discpline drivers use the
Linux tty line discpline framework to route trace data coming
from a tty port (say UART for example) to the trace sink line
discipline driver and to another tty port(say USB). Those
these two line discipline drivers can be used together,
independently from pti.c, they are part of the original
implementation solution of the MIPI P1149.7, compact JTAG, PTI
solution for Intel mobile platforms starting with the
Medfield platform.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The PTI (Parallel Trace Interface) driver directs
trace data routed from various parts in the system out
through an Intel Penwell PTI port and out of the mobile
device for analysis with a debugging tool (Lauterbach or Fido).
Though n_tracesink and n_tracerouter line discipline drivers
are used to extract modem tracing data to the PTI driver
and other parts of an Intel mobile solution, the PTI driver
can be used independent of n_tracesink and n_tracerouter.
You should select this driver if the target kernel is meant for
an Intel Atom (non-netbook) mobile device containing a MIPI
P1149.7 standard implementation.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This provides Kernel documentation for the PTI
feature and setting line discipline drivers
on top of tty's for Linux mobile solutions.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This allows drivers who call this function to be compiled modularly.
Otherwise, a driver who is interested in this type of functionality
has to implement their own get_task_comm() call, causing code
duplication in the Linux source tree.
Signed-off-by: J Freyensee <james_p_freyensee@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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According to removing ARCH_S5P6442, we don't need to support
serial for S5P6442.
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Support new device OKI SEMICONDUCTOR ML7223 IOH(Input/Output Hub).
The ML7223 IOH is for MP(Media Phone) use.
The ML7223 is companion chip for Intel Atom E6xx series.
The ML7223 is completely compatible for Intel EG20T PCH.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Add support to the 8250 PCI serial driver for the Digi/IBM PCIe 2-port Async EIA-232 Adapter.
Oxford Semiconductor produces a 2/4/8 port UART (OXPCIe952/OXPCIe954/OXPCIe958) chip
called the Tornado, that can be used to create a very simple serial board product.
The kernel sources currently have just 2 vendors using this chip, which is Oxford and Mainpipe.
This new Digi/IBM serial product now uses it as well.
Rather than create a long running comment of vendors using the chip, the one changed comment
in the patch below now just lists "For Oxford Semiconductor Tornado based devices" to be a
more generic comment for all vendors that end up using the Oxford Tornado chip.
Cc: Michael Reed <mreed10@us.ibm.com>
Signed-off-by: Scott Kilau <scottk@digi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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receive_buf() was recently changed to return the number of bytes
received but the cx20442 driver wasn't updated to match the new API.
I don't have any hardware but since we don't actually appears to be
listening to the data at all just report that we accepted all the data
that was offered to us.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Support new device OKI SEMICONDUCTOR ML7223 IOH(Input/Output Hub).
The ML7223 IOH is for MP(Media Phone) use.
The ML7223 is companion chip for Intel Atom E6xx series.
The ML7223 is completely compatible for Intel EG20T PCH.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This is needed as part of making the various IT87 drivers actually co-exist
politely with each other, and with other superio devices that may be muxed
on 0x2E/0x2F.
It can be applied before or after the other patches by Nat Gurumoorthy without
problem.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The Xilinx PS Uart is used on the new ARM based SoC. This
UART is not compatible with others such that a seperate
driver is required.
Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Use the standard mechanism to print a hex buffer
to eliminate empty printf warning.
A couple % smaller text and data too.
$ size drivers/tty/n_gsm.o*
text data bss dec hex filename
23543 312 6376 30231 7617 drivers/tty/n_gsm.o.new
24051 408 6496 30955 78eb drivers/tty/n_gsm.o.old
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The tty value that should be put is the one that was just gotten by
tty_port_tty_get, not the one that is the argument to the enclosing
function.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@exists@
local idexpression struct tty_struct *x;
expression ra,rr;
statement S1,S2;
@@
x = tty_port_tty_get(...)
... when != x = rr
when any
when != tty_kref_put(x,...)
when != if (...) { ... tty_kref_put(x,...) ...}
(
if(<+...x...+>) S1 else S2
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if(...) { ... when != x = ra
when forall
when != tty_kref_put(x,...)
*return...;
}
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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tty_write_lock and tty_write_unlock contain imbalanced locking. But
this is intentional, so mark them appropriately by
__acquires/__releases.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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msleep* is guaranteed to return with TASK_RUNNING task state. And
since there is no other set_task_state in the paths of
uart_wait_until_sent, we need not to set_task_state to TASK_RUNNING.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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tty->index (named here as line) is set up in initialize_tty_struct.
The value is checked in get_tty_driver for the found driver as:
if (device < base || device >= base + p->num)
continue;
*index = device - base;
So index/line can never be more than driver->num. Hence remove this
test from uart_open.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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moxa_write can be called from atomic context with irqs disabled (from
ppp_async_push). Don't enable interrupts by spin_unlock_bh as this
might cause deadlocks in the ppp layer.
Instead, use irqsave/irqrestore spin_lock functions.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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tty_sem used to protect tty open count. This was removed in 33dd474a
but the lock remained in place.
So remove it completely as it protects nothing now.
Also this solves Mac's problem with inatomic operation called from
atomic context (ppp):
BUG: scheduling while atomic: firefox-bin/1992/0x10000800
Modules linked in: ...
Pid: 1992, comm: firefox-bin Not tainted 2.6.38 #1
Call Trace:
...
[] ? mutex_lock+0xe/0x21
[] ? ntty_write+0x5d/0x192 [nozomi]
[] ? __mod_timer.clone.30+0xbe/0xcc
[] ? check_preempt_curr+0x60/0x6d
[] ? __nf_ct_refresh_acct+0x75/0xbe
[] ? ppp_async_push+0xa9/0x3bd [ppp_async]
[] ? ppp_async_send+0x34/0x40 [ppp_async]
[] ? ppp_push+0x6c/0x4f9 [ppp_generic]
...
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Mac <kmac@poczta.fm>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Reviewed-by: Jack Stone <jwjstone@fastmail.fm>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Before 33dd474a, these were some kind of protection against race with
HUP. They were protected with port->tty_sem at the same time.
By that commit, the counting was switched to tty_port's one, but the
locking remained the old one. So the count was not protected by
any lock anymore.
The driver should not test whether it raced with HUP or not anyways.
With the new refcounted tty model, it just should proceed as nothing
happened because all needed info is still there. In respect to this,
let's drop the useless and unprotected tests (tty_port->count is
protected by tty_port->lock).
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The allocation was moved to probe function in 9842c38e9176. And we can
sleep there. So allocate the 4*8192 bytes as GFP_KERNEL to mitigate
the allocation failure.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Tested-by: Gerald Pfeifer <gerald@pfeifer.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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it makes it simpler to keep track of the amount of
bytes received and simplifies how flush_to_ldisc counts
the remaining bytes. It also fixes a bug of lost bytes
on n_tty when flushing too many bytes via the USB
serial gadget driver.
Tested-by: Stefan Bigler <stefan.bigler@keymile.com>
Tested-by: Toby Gray <toby.gray@realvnc.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Remove stale code in serial_core layer.
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Traditional \E[2J sequence erases console display but scroll-back
buffer and underlying device (frame) buffer keep data that can be
accessed by scrolling console back.
This patch introduce new \E[J parameter 3 that allows to scramble
scroll-back buffer explicitly. Session locking programs (screen,
vlock) can use it to prevent attacker to browse locked console
history.
Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Including linux/tty.h 3 times is a little over the top - once will do.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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remove invalid location line in each file header after location
moved from driver/char to driver/tty
Signed-off-by: Jovi Zhang <bookjovi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Now, uart_update_termios is empty, so it's time to remove it. We no
longer need a live tty in .dtr_rts. So this should prune all the bugs
where tty is zeroed in port->tty during tty_port_block_til_ready.
There is one thing to note. We don't set ASYNC_NORMAL_ACTIVE now. It's
because this is done already in tty_port_block_til_ready.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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In .dtr_rts we do:
uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS)
and call uart_update_termios. It does:
uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS)
once again. As the only callsite of uart_update_termios is .dtr_rts,
remove the uart_set_mctrl from uart_update_termios to not set it twice.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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We should not fiddle with speed and cflags in .dtr_rts hook. Actually
we might not have tty at that moment already.
So move the console cflag copy and speed setup into uart_startup.
Actually the speed setup is already there, but we need to call it
unconditionally (uart_startup is called from uart_open with hw_init =
0).
This means we move uart_change_speed before dtr/rts setup in .dtr_rts.
But this should not matter as the setup should be called after
uart_change_speed anyway.
Before: After:
dtr/rts setup (dtr_rts) uart_change_speed (startup)
uart_change_speed (update_termios) dtr/rts setup (dtr_rts)
dtr/rts setup (update_termios) dtr/rts setup (update_termios)
The second setup will dismiss with the next patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The bit is set in tty_port_block_til_ready (via moxa_open) and unset
in tty_port_close (via moxa_close). No need to pin it in the driver.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Devices extracted from device tree all seem to have pdev->id set to -1.
Up until now we mapped all devices with id -1 to the first device. This
behaviour could lead to problems when using more than one Altera UART in
a system.
This patch changes the behaviour of the driver to scan for the next free
id in case the id is -1.
Because we cannot refer back to the assigned id in altera_uart_remove,
the port instance needs to be stored in device drvdata.
Reported-by: David Smoot <davidsmoot@gmail.com>
Cc: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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When tty_add_file fails we omit to clean up. Fix that by calling
tty_release appropriatelly.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Used the newly introduced deinitialize_tty_struct to properly shut
down ldisc.
It is intended to fix the Julian's reported problem. He reports that
kmemleak checker warns about memory leak:
unreferenced object 0xc0e19860 (size 8):
comm cat, pid 1226, jiffies 4294919464 (age 287.476s)
hex dump (first 8 bytes):
44 de 2d c1 01 00 00 00 D.-.....
backtrace:
[<c1065a74>] create_object+0x109/0x1ad
[<c1063d2b>] kmem_cache_alloc+0x60/0x68
[<c113505c>] tty_ldisc_get+0x54/0x76
[<c11358c9>] tty_ldisc_init+0xa/0x20
[<c1130ab4>] initialize_tty_struct+0x2d/0x1ac
[<c1130c8c>] tty_init_dev+0x59/0x10d
[<c113136d>] tty_open+0x24a/0x3a2
...
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Reported-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Introduce deinitialize_tty_struct which should be called after
initialize_tty_struct and before successfull tty_ldisc_setup.
It calls tty_ldisc_deinit which is opposite of tty_ldisc_init. It only
puts a reference to ldisc and assigns NULL to tty->ldisc.
It will be used to shut down ldisc when tty_release cannot be called
yet.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Change it so that we call the deinit functions at one place at the end
of the function (by gotos). And while at it use some sane label names.
This is a preparation for the deinitialization of tty in the next
patch.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/rocket.c:1393:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1412:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1730:2: warning: Value stored to 'cp' is never read
cp = &info->channel;
^ ~~~~~~~~~~~~~~
drivers/tty/rocket.c:1825:3: warning: Value stored to 'str' is never read
str = "8";
^ ~~~
[many 'str' warnings stripped]
drivers/tty/rocket.c:2037:3: warning: Value stored to 'board_type' is never read
board_type = "RocketModem";
^ ~~~~~~~~~~~~~
[some 'board_type' warnings stripped]
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/moxa.c:1287:2: warning: Value stored to 'port' is never read
port = tty->index;
^ ~~~~~~~~~~
drivers/tty/moxa.c:1763:2: warning: Value stored to 'cflag' is never read
cflag = termio->c_cflag; /* termio->c_cflag */
^ ~~~~~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/vt/vt.c:892:2: warning: Value stored to 'old_screen_size' is never read
old_screen_size = vc->vc_screenbuf_size;
^ ~~~~~~~~~~~~~~~~~~~~~
drivers/tty/vt/vt.c:890:2: warning: Value stored to 'old_cols' is never read
old_cols = vc->vc_cols;
^ ~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/cyclades.c:1454:2: warning: Value stored to 'channel' is never read
channel = info->line - card->first_line;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix it by moving it to the appropriate debug section where it is used.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/serial/serial_core.c:1980:2: warning: Value stored to 'tty' is never read
tty = port->tty;
^ ~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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drivers/tty/vt/vt_ioctl.c:1525:2: warning: Value stored to 'kbd' is never read
kbd = kbd_table + console;
^ ~~~~~~~~~~~~~~~~~~~
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Cc: Arthur Taylor <art@ified.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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After adding support for K_OFF in KDSKBMODE, it was forgotten to
add support for returning it in KDGKBMODE.
Signed-off-by: Arthur Taylor <art@ified.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The current check is uneeded, since !retval will always returns true,
as retval returned from tty_add_file is checked earlier and tty_open
exits if it's not zero.
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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* 'for-39-rc4' of git://codeaurora.org/quic/kernel/davidb/linux-msm:
msm: timer: fix missing return value
msm: Remove extraneous ffa device check
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