Willy Tarreau e8d650563c misc: panel: properly restore atomic counter on error path ...

commit 93dc1774d2 upstream.

Commit f4757af ("staging: panel: Fix single-open policy race condition")
introduced in 3.19-rc1 attempted to fix a race condition on the open, but
failed to properly do it and used to exit without restoring the semaphore.

This results in -EBUSY being returned after the first open error until
the module is reloaded or the system restarted (ie: consecutive to a
dual open resulting in -EBUSY or to a permission error).

Fixes: f4757af85 # 3.19-rc1
Cc: Mariusz Gorski <marius.gorski@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
[wt: driver is in staging/panel in 4.4]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-11-18 11:11:07 +01:00

..

Kconfig

Staging: panel: Adjust range for PANEL_KEYPAD in Kconfig

2009-12-23 11:27:49 -08:00

lcd-panel-cgram.txt

trivial: Miscellaneous documentation typo fixes

2009-06-12 18:01:47 +02:00

Makefile

…

panel.c

misc: panel: properly restore atomic counter on error path

2017-11-18 11:11:07 +01:00

TODO

staging: panel: Remove outdated TODO task

2014-11-03 16:22:50 -08:00