[PATCH v2] linux: Retry VT ioctls while errno == EINTR

[Cyril Brulebois]

Aaron Plattner <aplattner at nvidia.com> (07/04/2011):
> When the smart scheduler is enabled, the VT ioctls (particularly
> VT_WAITACTIVE) can be interrupted by the smart scheduler's SIGALRMs.
> Previously, this caused the server to immediately continue on to
> ScreenInit, almost certainly causing a crash or failure because the X
> server that owned the VT hadn't finished cleaning up.  As of commit
> 7ee965a300c9eddcc1acacf9414cfe3e589222a8, it causes a FatalError
> instead.
> 
> Retrying the ioctl as long as it fails with errno == EINTR fixes the
> problem and allows server regenerations to trigger VT switches that
> actually succeed.
> 
> Signed-off-by: Aaron Plattner <aplattner at nvidia.com>

Reviewed-by: Cyril Brulebois <kibi at debian.org>

KiBi.
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