firmware: meson_sm: fix to avoid potential NULL pointer dereference
commitf2ed165619
upstream. of_match_device() may fail and returns a NULL pointer. Fix this by checking the return value of of_match_device. Fixes:8cde3c2153
("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.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -302,6 +302,8 @@ static int __init meson_sm_probe(struct platform_device *pdev)
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return -ENOMEM;
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chip = of_match_device(meson_sm_ids, dev)->data;
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if (!chip)
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return -EINVAL;
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if (chip->cmd_shmem_in_base) {
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fw->sm_shmem_in_base = meson_sm_map_shmem(chip->cmd_shmem_in_base,
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