[PATCH 2/3] drm/omap: fix possible NULL ref issue in tiler_reserve_2d

[Tomi Valkeinen]

tiler_reserve_2d allocates memory but does not check if it got the
memory. Add the check and return ENOMEM on failure.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
index c40f90d2db82..28d93ece191e 100644
--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -532,6 +532,9 @@ struct tiler_block *tiler_reserve_2d(enum tiler_fmt fmt, u16 w,
 	unsigned long flags;
 	u32 slot_bytes;
 
+	if (!block)
+		return ERR_PTR(-ENOMEM);
+
 	BUG_ON(!validfmt(fmt));
 
 	/* convert width/height to slots */
-- 
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