Marek Roszko 8bc661bfc0 tty/serial: at91: disable uart timer at start of shutdown ...

The uart timer will schedule a tasklet when it fires. It is possible that it
can fire inside _shutdown before it is killed in the dma and pdc cleanup
routines. This causes a tasklet that exists after the port is shutdown, so when
the kernel finally executes it, it panics as the tty port is NULL.

This is a somewhat rare condition but its possible if a program keeps on
opening/closing the port. It has been observed in particular with systemd
boot messages that were causing a kernel panic because of this behavior.

Moving the timer deletion to the beginning of the function stops a tasklet from
being scheduled unexpectedly.

Signed-off-by: Marek Roszko <mark.roszko@gmail.com>
Cc: stable <stable@vger.kernel.org> # v3.12
[nicolas.ferre@atmel.com: modify commit message, call setup_timer() in any case]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-01-13 15:55:59 -08:00

..

hvc

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00

ipwireless

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00

serial

tty/serial: at91: disable uart timer at start of shutdown

2014-01-13 15:55:59 -08:00

vt

vt: properly ignore xterm-256 colour codes

2013-09-26 15:58:27 -07:00

amiserial.c

tty/amiserial: avoid interruptible_sleep_on

2014-01-07 17:05:21 -08:00

bfin_jtag_comm.c

TTY: bfin_jtag_comm: fix incorrect placement of __initdata tag

2013-09-30 19:09:37 -07:00

cyclades.c

tty: an overflow of multiplication in drivers/tty/cyclades.c

2013-12-20 12:21:57 -08:00

ehv_bytechan.c

drivers: clean-up prom.h implicit includes

2013-10-09 20:04:04 -05:00

goldfish.c

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00

isicom.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

Kconfig

tty: metag_da: Add metag DA TTY driver

2013-02-06 11:10:17 -08:00

Makefile

tty: Add timed, writer-prioritized rw semaphore

2013-05-20 12:30:32 -07:00

metag_da.c

tree-wide: use reinit_completion instead of INIT_COMPLETION

2013-11-15 09:32:21 +09:00

moxa.c

TTY: add tty_port_tty_hangup helper

2013-03-18 16:24:29 -07:00

moxa.h

…

mxser.c

tty: mxser: Fix build warning introduced by dfc7b837c7f9 (Re: linux-next: build warning after merge of the tty.current tree)

2013-05-22 10:26:02 -07:00

mxser.h

…

n_gsm.c

TTY/n_gsm: Removing the wrong tty_unlock/lock() in gsm_dlci_release()

2013-12-18 16:58:28 -08:00

n_hdlc.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

n_r3964.c

tty: Always handle NULL flag ptr

2013-12-08 16:56:05 -08:00

n_tracerouter.c

…

n_tracesink.c

…

n_tracesink.h

…

n_tty.c

Merge 3.13-rc5 into tty-next

2013-12-24 10:10:47 -08:00

nozomi.c

tty: Remove unnecessary semicolons

2013-10-16 13:08:16 -07:00

pty.c

tty: Fix lock order in tty_do_resize()

2013-07-24 15:12:53 -07:00

rocket_int.h

…

rocket.c

tty: remove DEFINE_PCI_DEVICE_TABLE macro

2013-12-08 17:09:07 -08:00

rocket.h

…

synclink_gt.c

tty: synclink: avoid sleep_on race

2014-01-07 17:05:21 -08:00

synclink.c

tty: synclink: avoid sleep_on race

2014-01-07 17:05:21 -08:00

synclinkmp.c

tty: synclink: avoid sleep_on race

2014-01-07 17:05:21 -08:00

sysrq.c

sysrq: Allow magic SysRq key functions to be disabled through Kconfig

2013-10-16 13:01:44 -07:00

tty_audit.c

audit: do not needlessly take a lock in tty_audit_exit

2013-04-30 15:31:28 -04:00

tty_buffer.c

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00

tty_io.c

tty: Reset hupped state on open

2013-11-25 08:56:49 -08:00

tty_ioctl.c

tty: Fix SIGTTOU not sent with tcflush()

2013-09-25 17:52:17 -07:00

tty_ldisc.c

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00

tty_ldsem.c

tty: Fix hang at ldsem_down_read()

2013-12-16 16:55:43 -08:00

tty_mutex.c

tty: tty_mutex.c: Fixed coding style warning (using printk)

2012-10-24 11:34:51 -07:00

tty_port.c

tty: delete non-required instances of include <linux/init.h>

2014-01-07 17:05:21 -08:00