kernel.git/drivers/auxdisplay/panel.c, branch linux-4.13.y

auxdisplay: charlcd: properly restore atomic counter on error path

2017-10-12T09:56:15Z

commit 93dc1774d2a4c7a298d5cdf78cc8acdcb7b1428d 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). [ Note for stable maintainers: the code moved from drivers/misc/panel.c to drivers/auxdisplay/{charlcd,panel}.c during 4.12. The patch easily applies there (modulo the renamed atomic counter) but I can provide a tested backport if desired. ] Fixes: f4757af85 # 3.19-rc1 Cc: Mariusz Gorski Cc: Geert Uytterhoeven Cc: Miguel Ojeda Sandonis Signed-off-by: Willy Tarreau Signed-off-by: Greg Kroah-Hartman

auxdisplay: Convert list_for_each to entry variant

2017-05-25T16:24:03Z

convert list_for_each() to list_for_each_entry() where applicable. Signed-off-by: Wei Yongjun Reviewed-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman

auxdisplay: Move panel.c to drivers/auxdisplay folder

2017-04-08T15:48:20Z

It looks like panel.c belongs to auxdisplay subsystem. Move it to drivers/auxdisplay folder. No functional changes intended. Acked-by: Geert Uytterhoeven Signed-off-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman