[src/netbsd-7]: src/sys/external/bsd/drm2/dist/drm/i915 Pull up following rev...

[snj <snj%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/470885d6858b
branches:  netbsd-7
changeset: 798360:470885d6858b
user:      snj <snj%NetBSD.org@localhost>
date:      Sun Sep 21 18:11:37 2014 +0000

description:
Pull up following revision(s) (requested by riastradh in ticket #99):
        sys/external/bsd/drm2/dist/drm/i915/i915_irq.c: revision 1.9
Lock irq_lock around i915_error_wake_up in i915_error_work_func.

diffstat:

 sys/external/bsd/drm2/dist/drm/i915/i915_irq.c |  2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diffs (13 lines):

diff -r 6bdea3f81aee -r 470885d6858b sys/external/bsd/drm2/dist/drm/i915/i915_irq.c
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_irq.c    Sun Sep 21 18:10:52 2014 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_irq.c    Sun Sep 21 18:11:37 2014 +0000
@@ -2250,7 +2250,9 @@
                 * Note: The wake_up also serves as a memory barrier so that
                 * waiters see the update value of the reset counter atomic_t.
                 */
+               spin_lock(&dev_priv->irq_lock);
                i915_error_wake_up(dev_priv, true);
+               spin_unlock(&dev_priv->irq_lock);
        }
 }