Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Jiri Slaby 100eeae2c5 TTY: restore tty_ldisc_wait_idle ... It was removed in 65b770468e (tty-ldisc: turn ldisc user count into a proper refcount), but we need to wait for last user to quit the ldisc before we close it in tty_set_ldisc. Otherwise weird things start to happen. There might be processes waiting in tty_read->n_tty_read on tty->read_wait for input to appear and at that moment, a change of ldisc is fatal. n_tty_close is called, it frees read_buf and the waiting process is still in the middle of reading and goes nuts after it is woken. Previously we prevented close to happen when others are in ldisc ops by tty_ldisc_wait_idle in tty_set_ldisc. But the commit above removed that. So revoke the change and test whether there is 1 user (=we), and allow the close then. We can do that without ldisc/tty locks, because nobody else can open the device due to TTY_LDISC_CHANGING bit set, so we in fact wait for everybody to leave. I don't understand why tty_ldisc_lock would be needed either when the counter is an atomic variable, so this is a lockless tty_ldisc_wait_idle. On the other hand, if we fail to wait (timeout or signal), we have to reenable the halted ldiscs, so we take ldisc lock and reuse the setup path at the end of tty_set_ldisc. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Tested-by: Sebastian Andrzej Siewior <bigeasy@breakpoint.cc> LKML-Reference: <20101031104136.GA511@Chamillionaire.breakpoint.cc> LKML-Reference: <1287669539-22644-1-git-send-email-jslaby@suse.cz> Cc: Alan Cox <alan@linux.intel.com> Cc: stable@kernel.org [32, 33, 36] Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2010-11-09 15:04:21 -08:00
..
accessibility
acpi	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2010-10-26 17:28:37 -07:00
amba
ata	ATA: pata_octeon_cf: Use I/O clock rate for timing calculations.	2010-10-29 19:08:41 +01:00
atm	drivers/atm/eni.c: Remove multiple uses of KERN_<level>	2010-10-26 11:35:37 -07:00
auxdisplay
base	Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6	2010-10-29 15:09:56 -07:00
block	floppy: fix another use-after-free	2010-11-06 07:49:56 -07:00
bluetooth
cdrom	cdrom: gdrom: ctrl_in/outX to __raw_read/writeX conversion.	2010-10-27 14:33:39 +09:00
char	nozomi: Fix warning from the previous TIOCGCOUNT changes	2010-11-09 14:49:38 -08:00
clocksource	ARM: shmobile: remove sh_timer_config clk member	2010-10-31 10:40:39 -04:00
connector	connector: remove lazy workqueue creation	2010-10-24 14:20:01 -07:00
cpufreq
cpuidle
crypto	replace nested max/min macros with {max,min}3 macro	2010-10-26 16:52:12 -07:00
dca
dio
dma	drivers/dma/Kconfig: add part number for Topcliff.	2010-10-29 14:14:02 -07:00
edac	Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core	2010-10-26 10:13:48 -07:00
eisa
firewire	Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6	2010-11-05 14:17:22 -07:00
firmware	dmi: log board, system, and BIOS information	2010-10-27 18:03:05 -07:00
gpio	gpio: Add VIA VX855 GPIO driver	2010-10-29 00:29:51 +02:00
gpu	Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2010-10-27 20:37:06 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2010-10-25 07:59:01 -07:00
hwmon	hwmon: (ltc4261) Fix error message format	2010-11-05 10:17:19 -07:00
i2c	i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllers	2010-10-31 21:07:00 +01:00
ide	ide: clean up timed out request handling	2010-10-26 10:17:30 -07:00
idle	Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6	2010-10-26 17:28:07 -07:00
ieee802154
infiniband	convert get_sb_single() users	2010-10-29 04:16:28 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2010-10-31 21:02:39 -04:00
isdn	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2010-11-05 15:25:48 -07:00
leds	leds-net5501: taints kernel, add license	2010-11-05 09:51:56 -07:00
lguest
macintosh	Move ams driver to macintosh	2010-10-28 20:31:50 +02:00
mca
md	md: tidy up device searches in read_balance.	2010-10-29 16:40:33 +11:00
media	Input: ir-keytable - fix uninitialized variable warning	2010-10-31 21:05:43 -04:00
memstick
message
mfd	mfd: Fix a memory leak when unload mc13xxx-core module	2010-10-29 00:30:43 +02:00
misc	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb	2010-10-29 11:49:38 -07:00
mmc	mfd: Adding twl6030 mmc card detect support for MMC1	2010-10-29 00:29:59 +02:00
mtd	Merge git://git.infradead.org/mtd-2.6	2010-10-30 08:31:35 -07:00
net	ipw2x00: remove the right /proc/net entry	2010-11-05 18:57:04 -07:00
nubus
of
oprofile	Merge branches 'perf-fixes-for-linus' and 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-30 11:43:26 -07:00
parisc	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6	2010-10-28 09:24:14 -07:00
parport	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
pci	Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen	2010-10-28 17:11:17 -07:00
pcmcia	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
platform	Remove duplicate includes from many files	2010-10-27 18:03:18 -07:00
pnp	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2010-10-26 17:28:37 -07:00
power	power: Revert "power_supply: Mark twl4030_charger as broken"	2010-10-29 00:30:44 +02:00
pps
ps3
rapidio	rapidio: fix destructive port EM initialization for Tsi568	2010-10-27 18:03:16 -07:00
regulator	regulator: max8998 BUCK1/2 voltage change with use of GPIOs	2010-10-29 00:30:15 +02:00
rtc	sh: mach-snapgear: Kill off machtype, consolidate board def.	2010-10-29 19:06:53 +09:00
s390	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2010-10-31 20:43:12 -04:00
sbus	Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6	2010-10-25 08:19:14 -07:00
scsi	[SCSI] pmcraid: add support for set timestamp command and other fixes	2010-10-29 12:03:01 -05:00
serial	SERIAL: blacklist si3052 chip	2010-11-09 15:03:07 -08:00
sfi
sh	Merge branches 'sh/pio-death', 'sh/nommu', 'sh/clkfwk', 'sh/core' and 'sh/intc-extension' into sh-fixes-for-linus	2010-11-08 09:42:43 +09:00
sn
spi	Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6	2010-11-01 07:50:43 -04:00
ssb
staging	Staging: ath6kl: remove empty files that mess with 'distclean'	2010-11-06 11:27:04 -07:00
tc
telephony
thermal
tty	TTY: restore tty_ldisc_wait_idle	2010-11-09 15:04:21 -08:00
uio	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
usb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	2010-11-05 15:25:48 -07:00
uwb	uwb: Remove the WLP subsystem and drivers	2010-10-25 14:03:45 +01:00
vhost
video	Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm	2010-10-30 08:26:25 -07:00
virtio
vlynq
w1	w1: don't allow arbitrary users to remove w1 devices	2010-10-27 18:03:17 -07:00
watchdog	WATCHDOG: octeon-wdt: Use I/O clock rate for timing calculations.	2010-10-29 19:08:42 +01:00
xen	convert get_sb_single() users	2010-10-29 04:16:28 -04:00
zorro
Kconfig
Makefile	TTY: create drivers/tty and move the tty core files there	2010-11-05 08:10:33 -07:00