From: Dan Carpenter <dan.carpenter@linaro.org>
Date: Wed, 31 Jan 2024 07:09:15 +0000 (+0300)
Subject: button: qcom-pmic: fix some error checking
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=6b929e9f3c16bbddeffb85351e93db13eaa9b57d;p=u-boot.git

button: qcom-pmic: fix some error checking

The pmic_reg_read() function can return errors.  Add a check for that.

Fixes: 4e8aa0065d4b ("button: qcom-pmic: introduce Qualcomm PMIC button driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
---

diff --git a/drivers/button/button-qcom-pmic.c b/drivers/button/button-qcom-pmic.c
index 34a976d1e6..e778e51a4f 100644
--- a/drivers/button/button-qcom-pmic.c
+++ b/drivers/button/button-qcom-pmic.c
@@ -86,7 +86,7 @@ static int qcom_pwrkey_probe(struct udevice *dev)
 	}
 
 	ret = pmic_reg_read(priv->pmic, priv->base + REG_SUBTYPE);
-	if ((ret & 0x7) == 0) {
+	if (ret < 0 || (ret & 0x7) == 0) {
 		printf("%s: unexpected PMCI function subtype %d\n", dev->name, ret);
 		return -ENXIO;
 	}