smatch warns:
drivers/gpu/drm/drm_lock.c:188 drm_legacy_lock() warn:
variable dereferenced before check 'master->lock.hw_lock' (see line 177)
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_lock.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index c901f3c5b269..32d43f86a8f2 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -176,7 +176,8 @@ int drm_legacy_lock(struct drm_device *dev, void *data,
DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock->context, task_pid_nr(current),
- master->lock.hw_lock->lock, lock->flags);
+ master->lock.hw_lock ? master->lock.hw_lock->lock : -1,
+ lock->flags);
add_wait_queue(&master->lock.lock_queue, &entry);
spin_lock_bh(&master->lock.spinlock);
--
2.10.2
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