msm: kgsl: Return error if the user allocates a buffer size of zero
Instead of calling BUG_ON if the user passes a zero length via
IOCTL_KGSL_GPUMEM_ALLOC to kgsl_sharedmem_alloc_user, return
-EINVAL instead and propegate the error back up to the user.
CRs-fixed: 389886
Change-Id: Ic0dedbad2dc1f68ad1d3227498893c73c2a1c59e
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_sharedmem.c b/drivers/gpu/msm/kgsl_sharedmem.c
index 2bd03fb..3f8071b 100644
--- a/drivers/gpu/msm/kgsl_sharedmem.c
+++ b/drivers/gpu/msm/kgsl_sharedmem.c
@@ -681,7 +681,8 @@
{
unsigned int protflags;
- BUG_ON(size == 0);
+ if (size == 0)
+ return -EINVAL;
protflags = GSL_PT_PAGE_RV;
if (!(flags & KGSL_MEMFLAGS_GPUREADONLY))