diff options
| author | Rob Clark <robdclark@gmail.com> | 2014-06-07 10:55:39 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-06-19 10:30:36 +1000 |
| commit | fb54918af7e7a607af8b70ba052a35ff8acb8620 (patch) | |
| tree | bb51589db1d6f29400242e08145c10f934036670 | |
| parent | 937a0c79870ccd7034640f72560653b269cc11c5 (diff) | |
| download | linux-fb54918af7e7a607af8b70ba052a35ff8acb8620.tar.bz2 | |
drm: fix uninitialized acquire_ctx fields (v2)
The acquire ctx will typically be declared on the stack, which means we
could have garbage values for any uninitialized field. In this case, it
was triggering WARN_ON()s because 'contended' had garbage value.
Go ahead and use memset() to be more future-proof.
v2: now with extra brown paper bag
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/drm_modeset_lock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c index 7c2497dea1e9..0dc57d5ecd10 100644 --- a/drivers/gpu/drm/drm_modeset_lock.c +++ b/drivers/gpu/drm/drm_modeset_lock.c @@ -64,6 +64,7 @@ void drm_modeset_acquire_init(struct drm_modeset_acquire_ctx *ctx, uint32_t flags) { + memset(ctx, 0, sizeof(*ctx)); ww_acquire_init(&ctx->ww_ctx, &crtc_ww_class); INIT_LIST_HEAD(&ctx->locked); } |