From 165b7643f2df890066b1b4e8a387888a600ca9bf Mon Sep 17 00:00:00 2001
From: Yang Yingliang <yangyingliang@huawei.com>
Date: Fri, 25 Nov 2022 14:35:48 +0800
Subject: [PATCH] mailbox: arm_mhuv2: Fix return value check in mhuv2_probe()
Git-commit: 165b7643f2df890066b1b4e8a387888a600ca9bf
Patch-mainline: v6.2-rc1
References: git-fixes
If devm_of_iomap() fails, it returns ERR_PTR() and never
return NULL, so replace NULL pointer check with IS_ERR()
to fix this problem.
Fixes: 5a6338cce9f4 ("mailbox: arm_mhuv2: Add driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mailbox/arm_mhuv2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mailbox/arm_mhuv2.c b/drivers/mailbox/arm_mhuv2.c
index a47aef8df52f..c6d4957c4da8 100644
--- a/drivers/mailbox/arm_mhuv2.c
+++ b/drivers/mailbox/arm_mhuv2.c
@@ -1062,8 +1062,8 @@ static int mhuv2_probe(struct amba_device *adev, const struct amba_id *id)
int ret = -EINVAL;
reg = devm_of_iomap(dev, dev->of_node, 0, NULL);
- if (!reg)
- return -ENOMEM;
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
mhu = devm_kzalloc(dev, sizeof(*mhu), GFP_KERNEL);
if (!mhu)
--
2.35.3