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Ilya Zykov a1bf958442 tty: Add driver unthrottle in ioctl(...,TCFLSH,..). 
Regression 'tty: fix "IRQ45: nobody cared"'
Regression commit 7b292b4bf9

  Function reset_buffer_flags() also invoked during the ioctl(...,TCFLSH,..).
At the time of request we can have full buffers and throttled driver too.
If we don't unthrottle driver, we can get forever throttled driver, because,
after request, we will have empty buffers and throttled driver and
there is no place to unthrottle driver.
It simple reproduce with "pty" pair then one side sleep on tty->write_wait,
and other side do ioctl(...,TCFLSH,..). Then there is no place to do writers wake up.

Signed-off-by: Ilya Zykov <ilya@ilyx.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2013-01-18 16:07:34 -08:00
..
hvc TTY: hvsi: use for_each_compatible_node() macro 2013-01-15 23:00:43 -08:00
ipwireless TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
serial serial: lpc32xx: Fix fallout from tty_port conversion 2013-01-18 16:05:15 -08:00
vt TTY: switch tty_schedule_flip 2013-01-15 22:43:15 -08:00
Kconfig Merge branch 'for-upstream' of http://github.com/agraf/linux-2.6 into queue 2012-10-10 19:03:54 -03:00
Makefile tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver 2011-08-23 10:32:56 -07:00
amiserial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
bfin_jtag_comm.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
cyclades.c cyclades: push down tty_port_tty_get 2013-01-15 22:43:15 -08:00
ehv_bytechan.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
isicom.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
moxa.c TTY: switch tty_schedule_flip 2013-01-15 22:43:15 -08:00
moxa.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
mxser.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
mxser.h Fix common misspellings 2011-03-31 11:26:23 -03:00
n_gsm.c Revert "n_gsm.c: add tx_lock in gsm_send" 2013-01-15 22:48:15 -08:00
n_hdlc.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
n_r3964.c tty: localise the lock 2012-08-10 12:55:47 -07:00
n_tracerouter.c n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tracesink.c n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tracesink.h n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tty.c tty: add missing newlines to WARN_RATELIMIT 2012-10-25 11:30:27 -07:00
nozomi.c TTY: nozomi, remove dead code 2013-01-15 22:43:16 -08:00
pty.c TTY: do not reset master's packet mode 2013-01-15 22:49:36 -08:00
rocket.c tty: rocket: Explicitly list supported PCI IDs 2013-01-17 17:28:39 -08:00
rocket.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
rocket_int.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
synclink.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
synclink_gt.c TTY: synclink, remove unneeded tests 2013-01-15 22:43:15 -08:00
synclinkmp.c TTY: synclink, remove unneeded tests 2013-01-15 22:43:15 -08:00
sysrq.c mm, oom: ensure sysrq+f always passes valid zonelist 2012-11-15 17:13:48 -08:00
tty_audit.c TTY: audit, stop accessing tty->icount 2012-10-22 16:50:54 -07:00
tty_buffer.c TTY: switch tty_schedule_flip 2013-01-15 22:43:15 -08:00
tty_io.c tty: Fix comments that reference BKL, eventd, old paths 2013-01-15 21:57:44 -08:00
tty_ioctl.c tty: Add driver unthrottle in ioctl(...,TCFLSH,..). 2013-01-18 16:07:34 -08:00
tty_ldisc.c tty: don't deadlock while flushing workqueue 2013-01-15 23:07:15 -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: introduce tty_port_destroy 2012-11-15 17:20:58 -08:00