linux-stable.git/drivers/tty/serial, branch linux-3.11.y

serial: vt8500: add missing braces

2013-11-04T12:35:21+00:00

commit d969de8d83401683420638c8107dcfedb2146f37 upstream.

Due to missing braces on an if statement, in presence of a device_node a
port was always assigned -1, regardless of any alias entries in the
device tree. Conversely, if device_node was NULL, an unitialized port
ended up being used.

This patch adds the missing braces, fixing the issues.

Signed-off-by: Roel Kluin 
Acked-by: Tony Prisk 
Signed-off-by: Greg Kroah-Hartman

serial: pch_uart: fix tty-kref leak in dma-rx path

2013-10-05T14:17:55+00:00

commit 19b85cfb190eb9980eaf416bff96aef4159a430e upstream.

Fix tty_kref leak when tty_buffer_request room fails in dma-rx path.

Note that the tty ref isn't really needed anymore, but as the leak has
always been there, fixing it before removing should makes it easier to
backport the fix.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

serial: pch_uart: fix tty-kref leak in rx-error path

2013-10-05T14:17:55+00:00

commit fc0919c68cb2f75bb1af759315f9d7e2a9443c28 upstream.

Fix tty-kref leak introduced by commit 384e301e ("pch_uart: fix a
deadlock when pch_uart as console") which never put its tty reference.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

serial: tegra: fix tty-kref leak

2013-10-05T14:17:55+00:00

commit cfd29aa0e81b791985e8428e6507e80e074e6730 upstream.

Fix potential tty-kref leak in stop_rx path.

Signed-off-by: Johan Hovold 
Tested-by: Stephen Warren 
Signed-off-by: Greg Kroah-Hartman

parisc: Fix interrupt routing for C8000 serial ports

2013-07-31T21:42:32+00:00

We can't use dev->mod_index for selecting the interrupt routing entry,
because it's not an index into interrupt routing table. It will be even
wrong on a machine with 2 CPUs (4 cores). But all needed information is
contained in the PAT entries for the serial ports. mod[0] contains the
iosapic address and mod_info has some indications for the interrupt
input (at least it looks like it). This patch implements the searching
for the right iosapic and uses this interrupt input information.

Signed-off-by: Thomas Bogendoerfer 
Cc:  # 3.10
Signed-off-by: Helge Deller

serial: arc_uart: Fix module alias

2013-07-26T23:34:00+00:00

Platform drivers use "platform:" prefix in module alias.
Also use DRIVER_NAME in MODULE_ALIAS to make module autoloading work.

Signed-off-by: Axel Lin 
Acked-by: Vineet Gupta 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman

serial/mxs-auart: increase time to wait for transmitter to become idle

2013-07-26T23:34:00+00:00

Without this patch the driver waits ~1 ms for the UART to become idle. At
115200n8 this time is (theoretically) enough to transfer 11.5 characters
(= 115200 bits/s / (10 Bits/char) * 1ms). As the mxs-auart has a fifo size
of 16 characters the clock is gated too early. The problem is worse for
lower baud rates.

This only happens to really shut down the transmitter in the middle of a
transfer if /dev/ttyAPPx isn't opened in userspace (e.g. by a getty) but
was at least once (because the bootloader doesn't disable the transmitter).

So increase the timeout to 20 ms which should be enough for 9600n8, too.
Moreover skip gating the clock if the timeout is elapsed.

Cc: stable@vger.kernel.org # v2.6.39+
Signed-off-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

serial/mxs-auart: fix race condition in interrupt handler

2013-07-26T23:33:59+00:00

The handler needs to ack the pending events before actually handling them.
Otherwise a new event might come in after it it considered non-pending or
handled and is acked then without being handled. So this event is only
noticed when the next interrupt happens.

Without this patch an i.MX28 based machine running an rt-patched kernel
regularly hangs during boot.

Cc: stable@vger.kernel.org # v2.6.39+
Signed-off-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

serial: tegra: correct help message in Kconfig from 'ttyHS' to 'ttyTHS'

2013-07-24T22:23:38+00:00

ttyTHS is consistent with the name used in driver.

Signed-off-by: Richard Zhao 
Acked-by: Stephen Warren 
Signed-off-by: Greg Kroah-Hartman

tty/8250_early: Don't truncate last character of options

2013-07-24T22:23:38+00:00

The earlier change to use strlcpy uncovered a bug in the options
argument length calculation causing last character to be truncated.
This makes the actual console to be configured with incorrect
baudrate when specifying the console using console=uart,... syntax.

Bug symptom seen in kernel log output:

Kernel command line: console=uart,mmio,0x90000000,115200
Early serial console at MMIO 0x90000000 (options '11520')

which then results in a invalid baud rate 11520 instead of the
expected 115200 when the console is switched to ttyS0 later
in the boot process.

Signed-off-by: Henrik Nordstrom 
Signed-off-by: Greg Kroah-Hartman