[src/trunk]: src/sys/external/bsd/drm2/dist/drm/i915 Need irq_lock to wait on...

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

details:   https://anonhg.NetBSD.org/src/rev/fa91e431c081
branches:  trunk
changeset: 835386:fa91e431c081
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 14:44:46 2018 +0000

description:
Need irq_lock to wait on irq_queue.  From mrg@.

diffstat:

 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (34 lines):

diff -r a1c5f1a6b0e6 -r fa91e431c081 sys/external/bsd/drm2/dist/drm/i915/i915_gem.c
--- a/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Mon Aug 27 14:44:30 2018 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c    Mon Aug 27 14:44:46 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i915_gem.c,v 1.50 2018/08/27 14:14:29 riastradh Exp $  */
+/*     $NetBSD: i915_gem.c,v 1.51 2018/08/27 14:44:46 riastradh Exp $  */
 
 /*
  * Copyright © 2008-2015 Intel Corporation
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.50 2018/08/27 14:14:29 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i915_gem.c,v 1.51 2018/08/27 14:44:46 riastradh Exp $");
 
 #ifdef __NetBSD__
 #if 0                          /* XXX uvmhist option?  */
@@ -1448,6 +1448,7 @@
        ((wedged = (reset_counter !=                                          \
                atomic_read(&dev_priv->gpu_error.reset_counter))) ||          \
            i915_gem_request_completed(req, false))
+       spin_lock(&dev_priv->irq_lock);
        if (timeout) {
                int ticks = missed_irq(dev_priv, ring) ? 1 :
                    nsecs_to_jiffies_timeout(*timeout);
@@ -1474,6 +1475,7 @@
                }
                /* ret is negative on failure or zero on success.  */
        }
+       spin_unlock(&dev_priv->irq_lock);
        if (wedged) {
                ret = i915_gem_check_wedge(&dev_priv->gpu_error, interruptible);
                if (ret == 0)