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drm/imx: imx-ldb: Check for null pointer after calling kmemdup

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[ Upstream commit 8027a9ad9b3568c5eb49c968ad6c97f279d76730 ]

As the possible failure of the allocation, kmemdup() may return NULL
pointer.
Therefore, it should be better to check the return value of kmemdup()
and return error if fails.

Fixes: dc80d7038883 ("drm/imx-ldb: Add support to drm-bridge")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20220105074729.2363657-1-jiasheng@iscas.ac.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2022-01-05 15:47:29 +08:00 committed by Greg Kroah-Hartman
parent 47fec6139b
commit c1e96348db
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/imx/imx-ldb.c
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@ -572,6 +572,8 @@ static int imx_ldb_panel_ddc(struct device *dev,
edidp = of_get_property(child, "edid", &edid_len);
if (edidp) {
channel->edid = kmemdup(edidp, edid_len, GFP_KERNEL);
if (!channel->edid)
return -ENOMEM;
} else if (!channel->panel) {
/* fallback to display-timings node */
ret = of_get_drm_display_mode(child,