Along the early error path for igt_switch_to_kernel_context we may try
to dereference an invalid error pointer. Instead, return early rather
than dump the GEM trace since we haven't yet emitted anything of
interest.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: 09a4c02e58c1 ("drm/i915: Look for an active kernel context before switching")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_gem_context.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
index 836f1af8b833..90c3c36173ba 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
@@ -519,8 +519,8 @@ static int igt_switch_to_kernel_context(void *arg)
mutex_lock(&i915->drm.struct_mutex);
ctx = kernel_context(i915);
if (IS_ERR(ctx)) {
- err = PTR_ERR(ctx);
- goto out_unlock;
+ mutex_unlock(&i915->drm.struct_mutex);
+ return PTR_ERR(ctx);
}
/* First check idling each individual engine */
--
2.18.0.rc2
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