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drm/i915: avoid non-atomic sysrq execution

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The sysrq functions are executed in hardirq context, so we shouldn't be
calling sleeping functions from them, like mutex_locks or memory
allocations.

Fix up the i915 sysrq handler to avoid this.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes 2009-05-15 14:11:48 -07:00 • committed by Eric Anholt
parent 42c2798b35
commit b66d18ddb1
1 changed files with 7 additions and 1 deletions

8
drivers/gpu/drm/i915/intel_fb.c
View file

@ -857,9 +857,15 @@ void intelfb_restore(void)
drm_crtc_helper_set_config(&kernelfb_mode);
}
static void intelfb_restore_work_fn(struct work_struct *ignored)
{
intelfb_restore();
}
static DECLARE_WORK(intelfb_restore_work, intelfb_restore_work_fn);
static void intelfb_sysrq(int dummy1, struct tty_struct *dummy3)
{
intelfb_restore();
schedule_work(&intelfb_restore_work);
}
static struct sysrq_key_op sysrq_intelfb_restore_op = {