[why]
i915_gem_object_put_pages_phys() frees pages and standard
pattern is to allow caller to not care if it's
NULL or not. This will reduce burden on
the callers to perform this check.
[how]
Fix it by adding Null check.
Signed-off-by: Yongzhi Liu <lyz_cs@xxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_phys.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_phys.c b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
index ca6faff..5445f41 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_phys.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_phys.c
@@ -95,6 +95,8 @@ void
i915_gem_object_put_pages_phys(struct drm_i915_gem_object *obj,
struct sg_table *pages)
{
+ if (!pages)
+ return;
dma_addr_t dma = sg_dma_address(pages->sgl);
void *vaddr = sg_page(pages->sgl);
--
2.7.4
