5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhang Shurong zhang_shurong@foxmail.com
commit f2ed165619c16577c02b703a114a1f6b52026df4 upstream.
of_match_device() may fail and returns a NULL pointer.
Fix this by checking the return value of of_match_device.
Fixes: 8cde3c2153e8 ("firmware: meson_sm: Rework driver as a proper platform driver") Signed-off-by: Zhang Shurong zhang_shurong@foxmail.com Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Link: https://lore.kernel.org/r/tencent_AA08AAA6C4F34D53ADCE962E188A879B8206@qq.co... Signed-off-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/firmware/meson/meson_sm.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/firmware/meson/meson_sm.c +++ b/drivers/firmware/meson/meson_sm.c @@ -302,6 +302,8 @@ static int __init meson_sm_probe(struct return -ENOMEM;
chip = of_match_device(meson_sm_ids, dev)->data; + if (!chip) + return -EINVAL;
if (chip->cmd_shmem_in_base) { fw->sm_shmem_in_base = meson_sm_map_shmem(chip->cmd_shmem_in_base,