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soc: fsl: guts: check return value after calling of_iomap() in fsl_guts_get_soc_uid()

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of_iomap() may return NULL, so we need check the return value.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Yang Yingliang 2022-06-28 22:02:49 +08:00 committed by Shawn Guo
parent edf12b913a
commit 63f9815307
1 changed files with 4 additions and 0 deletions
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4
drivers/soc/fsl/guts.c
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@ -126,6 +126,10 @@ static u64 fsl_guts_get_soc_uid(const char *compat, unsigned int offset)
return 0;
sfp_base = of_iomap(np, 0);
if (!sfp_base) {
of_node_put(np);
return 0;
}
uid = ioread32(sfp_base + offset);
uid <<= 32;