Dmitry Safonov 50e9fda865 tty: Don't block on IO when ldisc change is pending ... [ Upstream commit c96cf923a9 ] There might be situations where tty_ldisc_lock() has blocked, but there is already IO on tty and it prevents line discipline changes. It might theoretically turn into dead-lock. Basically, provide more priority to pending tty_ldisc_lock() than to servicing reads/writes over tty. User-visible issue was reported by Mikulas where on pa-risc with Debian 5 reboot took either 80 seconds, 3 minutes or 3:25 after proper locking in tty_reopen(). Cc: Jiri Slaby <jslaby@suse.com> Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Dmitry Safonov <dima@arista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-12-13 08:52:28 +01:00
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hvc
ipwireless	tty: ipwireless: fix missing checks for ioremap	2019-05-31 06:46:30 -07:00
serdev
serial	tty: serial: qcom_geni_serial: Fix softlock	2019-12-13 08:52:27 +01:00
vt	vt/fbcon: deinitialize resources in visual_init() after failed memory allocation	2019-06-09 09:17:21 +02:00
amiserial.c
cyclades.c
ehv_bytechan.c
goldfish.c
isicom.c
Kconfig
Makefile
mips_ejtag_fdc.c
moxa.c
moxa.h
mxser.c
mxser.h
n_gsm.c
n_hdlc.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
n_null.c
n_r3964.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
nozomi.c
pty.c	pty: fix compat ioctls	2019-12-01 09:16:16 +01:00
rocket_int.h
rocket.c	tty: rocket: fix incorrect forward declaration of 'rp_init()'	2019-07-10 09:53:44 +02:00
rocket.h
synclink_gt.c	synclink_gt(): fix compat_ioctl()	2019-12-01 09:16:16 +01:00
synclink.c
synclinkmp.c
sysrq.c
tty_audit.c
tty_baudrate.c
tty_buffer.c
tty_io.c
tty_ioctl.c
tty_jobctrl.c
tty_ldisc.c	tty: Don't block on IO when ldisc change is pending	2019-12-13 08:52:28 +01:00
tty_ldsem.c	tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop	2019-08-16 10:12:50 +02:00
tty_mutex.c
tty_port.c
vcc.c