The drm_gem_map_detach() can be called with sgt is NULL.
Signed-off-by: Joonyoung Shim jy0922.shim@samsung.com --- drivers/gpu/drm/drm_prime.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 1e0de41..ff5fece 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -119,12 +119,13 @@ static void drm_gem_map_detach(struct dma_buf *dma_buf, return;
sgt = prime_attach->sgt; + if (sgt) { + if (prime_attach->dir != DMA_NONE) + dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, + prime_attach->dir); + sg_free_table(sgt); + }
- if (prime_attach->dir != DMA_NONE) - dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, - prime_attach->dir); - - sg_free_table(sgt); kfree(sgt); kfree(prime_attach); attach->priv = NULL;