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828ed1259f
linux/drivers/staging
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Kautuk Consul 828ed1259f staging: quatech_usb2: Potential lost wakeup scenario in TIOCMIWAIT 
commit e8df1674d3 upstream.

If the usermode app does an ioctl over this serial device  by
using TIOCMIWAIT, then the code will wait by setting the current
task state to TASK_INTERRUPTIBLE and then calling schedule().
This will be woken up by the qt2_process_modem_status on URB
completion when the port_extra->shadowMSR is set to the new
modem status.

However, this could result in a lost wakeup scenario due to a race
in the logic in the qt2_ioctl(TIOCMIWAIT) loop and the URB completion
for new modem status in qt2_process_modem_status.
Due to this, the usermode app's task will continue to sleep despite a
change in the modem status.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-11 09:35:14 -08:00
..
altera-stapl Staging: altera: move .h file to proper place 2011-06-07 12:19:14 -07:00
asus_oled
ath6kl net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared 2011-08-15 18:31:38 -07:00
bcm Fix common misspellings 2011-03-31 11:26:23 -03:00
brcm80211 staging: brcm80211: fix for reported log spam problem 2011-08-04 21:58:34 -07:00
comedi staging: comedi: fix infoleak to userspace 2011-08-04 21:58:31 -07:00
cptm1217 drivers/staging/cptm1217/clearpad_tm1217.c: Correct call to input_free_device 2011-05-18 14:30:49 -07:00
crystalhd staging: Remove unnecessary semicolons when switch (foo) {...}; 2011-04-25 16:58:35 -07:00
cs5535_gpio staging: cs5535_gpio: check put_user() return code 2011-01-21 12:35:14 -08:00
cx25821 staging: Remove unnecessary semicolons when switch (foo) {...}; 2011-04-25 16:58:35 -07:00
cxd2099 [media] ngene: Fix compilation when cxd2099 is not enabled 2011-03-21 20:31:48 -03:00
cxt1e1 Fix common misspellings 2011-03-31 11:26:23 -03:00
dt3155v4l [media] V4L: remove V4L1 compatibility mode 2010-12-29 08:17:07 -02:00
easycap staging/easycap: easycap_probe: drop more unused variables 2011-05-18 14:30:08 -07:00
echo staging: echo: Trivial indentation changes 2011-05-17 13:31:29 -07:00
et131x Fix common misspellings 2011-03-31 11:26:23 -03:00
frontier
ft1000 Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2011-05-24 13:28:35 -07:00
generic_serial Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
gma500 staging: gma500: get control from firmware framebuffer if conflicts 2011-06-07 12:28:42 -07:00
go7007 Fix common misspellings 2011-03-31 11:26:23 -03:00
hv Staging: hv: netvsc: Increase the timeout value in the netvsc driver 2011-08-04 21:58:32 -07:00
iio Staging: iio: Make IIO depend on GENERIC_HARDIRQS 2011-06-27 14:19:21 -07:00
intel_sst Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-05-23 12:49:28 -07:00
keucr staging/keucr: fix transport other code style 2011-05-18 08:22:41 -07:00
line6 drivers/staging/line6/driver.c: Drop unneeded put functions. 2011-05-17 13:31:32 -07:00
lirc [media] [staging] lirc_serial: allocate irq at init time 2011-07-01 16:32:45 -03:00
mei Staging: mei: fix suspend failure 2011-06-27 14:19:21 -07:00
msm Fix common misspellings 2011-03-31 11:26:23 -03:00
nvec Staging: initial version of the nvec driver 2011-05-19 15:36:10 -07:00
octeon staging: octeon-ethernet: remove .get_sg, etc. ethtool_ops 2011-04-25 17:26:19 -07:00
olpc_dcon staging: fix olpc_dcon build, needs BACKLIGHT_CLASS_DEVICE 2011-06-07 12:28:39 -07:00
panel
phison Staging: phison: use DEFINE_PCI_DEVICE_TABLE 2010-12-09 16:29:48 -08:00
pohmelfs sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
quatech_usb2 staging: quatech_usb2: Potential lost wakeup scenario in TIOCMIWAIT 2011-11-11 09:35:14 -08:00
quickstart Staging: quickstart: fixed coding style issues 2011-02-09 12:11:55 -08:00
rtl8187se Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-04-07 11:36:44 -07:00
rtl8192e staging: r8192e_pci: Handle duplicate PCI ID 0x10ec:0x8192 conflict with rtl8192se 2011-08-04 21:58:31 -07:00
rtl8192u staging: rtl8192u: declare MODULE_FIRMWARE 2011-08-17 10:55:50 -07:00
rtl8712 staging: r8712u: Fix driver to support ad-hoc mode 2011-05-03 10:57:39 -07:00
rts_pstor staging: rts_pstor: use bitwise operator instead of logical one 2011-06-07 12:28:40 -07:00
sbe-2t3e3 Staging: sbe-2t3e3: redundant null check before kfree() 2011-04-20 13:45:57 -07:00
sep staging: sep: resolve issue with false zero length of page 2011-04-25 17:05:28 -07:00
serqt_usb2 staging: serqt_usb2: remove ssu100 from supported devices 2011-11-11 09:35:13 -08:00
slicoss Fix common misspellings 2011-03-31 11:26:23 -03:00
sm7xx Staging: sm7xx: printk loglevels modified to match the scenario 2011-05-19 15:34:32 -07:00
solo6x10 staging: solo6x10: add select SND_PCM to fix build error 2011-04-25 17:44:09 -07:00
speakup Fix common misspellings 2011-03-31 11:26:23 -03:00
spectra Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
ste_rmi4 Fix common misspellings 2011-03-31 11:26:23 -03:00
tidspbridge Revert wrong fixes for common misspellings 2011-04-26 23:31:11 -07:00
tm6000 [media] tm6000: fix uninitialized field, change prink to dprintk 2011-05-21 07:24:19 -03:00
tty Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2011-05-23 12:49:28 -07:00
usbip Staging: usbip: vhci-hcd: Do not kill already dead RX/TX kthread 2011-08-04 21:58:31 -07:00
vme Fix common misspellings 2011-03-31 11:26:23 -03:00
vt6655 staging: vt6655: Fix warnings if CONFIG_PM is not defined 2011-05-06 09:27:34 -07:00
vt6656 drivers/staging/vt6656/main_usb.c: Delete unnecessary call to usb_kill_urb 2011-05-17 11:37:57 -07:00
westbridge staging: Remove unnecessary semicolons when for (foo) {...}; 2011-04-25 16:58:35 -07:00
winbond Staging: winbond: wb35tx.c: Fixed coding style 2011-04-20 13:48:25 -07:00
wlags49_h2 staging: pcmcia: Convert pcmcia_device_id declarations to const 2011-05-06 07:47:02 +02:00
wlags49_h25 Fix common misspellings 2011-03-31 11:26:23 -03:00
wlan-ng Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-05-24 16:47:54 -04:00
xgifb Staging: xgifb: Fixed style issues. 2011-04-26 15:46:28 -07:00
zcache vmscan: change shrinker API by passing shrink_control struct 2011-05-25 08:39:26 -07:00
zram staging: Allow sharing xvmalloc for zram and zcache 2011-02-23 14:02:56 -08:00
Kconfig Staging: remove STAGING_EXCLUDE_BUILD option 2011-06-07 12:23:57 -07:00
Makefile Staging: initial version of the nvec driver 2011-05-19 15:36:10 -07:00
staging.c