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mtd: physmap-core: Fix NULL pointer dereferencing in of_select_probe_type()

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Coverity complains of a possible NULL dereference:

in of_select_probe_type():
1. returned_null: of_match_device() returns NULL.
2. var_assigned: match = NULL return value from of_match_device()
309	match = of_match_device(of_flash_match, &dev->dev);

3.dereference: Dereferencing the NULL pointer match.
310	probe_type = match->data;

Signed-off-by: Zeng Jingxiang <linuszeng@tencent.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220727060302.1560325-1-zengjx95@gmail.com
This commit is contained in:
Zeng Jingxiang 2022-07-27 14:03:02 +08:00 committed by Miquel Raynal
parent 26e784433e
commit 8b740c08eb
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/maps/physmap-core.c
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@ -300,6 +300,9 @@ static const char *of_select_probe_type(struct platform_device *dev)
const char *probe_type;
match = of_match_device(of_flash_match, &dev->dev);
if (!match)
return NULL;
probe_type = match->data;
if (probe_type)
return probe_type;