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pinctrl: aspeed: Fix potential NULL dereference in aspeed_pinmux_set_mux()

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[ Upstream commit 84a85d3fef2e75b1fe9fc2af6f5267122555a1ed ]

pdesc could be null but still dereference pdesc->name and it will lead to
a null pointer access. So we move a null check before dereference.

Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Link: https://lore.kernel.org/r/1650508019-22554-1-git-send-email-baihaowen@meizu.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Haowen Bai 2022-04-21 10:26:59 +08:00 committed by Greg Kroah-Hartman
parent 13fb9105cf
commit ef1e38532f
1 changed files with 2 additions and 2 deletions
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4
drivers/pinctrl/aspeed/pinctrl-aspeed.c
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@ -235,11 +235,11 @@ int aspeed_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
const struct aspeed_sig_expr **funcs;
const struct aspeed_sig_expr ***prios;
pr_debug("Muxing pin %s for %s\n", pdesc->name, pfunc->name);
if (!pdesc)
return -EINVAL;
pr_debug("Muxing pin %s for %s\n", pdesc->name, pfunc->name);
prios = pdesc->prios;
if (!prios)