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button: qcom-pmic: fix some error checking

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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>
This commit is contained in:
Dan Carpenter 2024-01-31 10:09:15 +03:00 committed by Caleb Connolly
parent 37345abb97
commit 6b929e9f3c
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1 changed files with 1 additions and 1 deletions
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drivers/button/button-qcom-pmic.c
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@ -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;
}