[PATCH 5.15 607/917] power: reset: at91-reset: check properly the return value of devm_of_iomap

Greg Kroah-Hartman
2021-11-15T23:53:49Z

From: Claudiu Beznea <claudiu.beznea@microchip.com>

[ Upstream commit f558c8072c3461b65c12c0068b108f78cebc8246 ]

devm_of_iomap() returns error code or valid pointer. Check its return
value with IS_ERR().

Fixes: bd3127733f2c ("power: reset: at91-reset: use devm_of_iomap")
Reported-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/reset/at91-reset.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
index 026649409135c..64def79d557a8 100644
--- a/drivers/power/reset/at91-reset.c
+++ b/drivers/power/reset/at91-reset.c
@@ -193,7 +193,7 @@ static int __init at91_reset_probe(struct platform_device *pdev)
return -ENOMEM;

reset->rstc_base = devm_of_iomap(&pdev->dev, pdev->dev.of_node, 0, NULL);
- if (!reset->rstc_base) {
+ if (IS_ERR(reset->rstc_base)) {
dev_err(&pdev->dev, "Could not map reset controller address\n");
return -ENODEV;
}
@@ -203,7 +203,7 @@ static int __init at91_reset_probe(struct platform_device *pdev)
for_each_matching_node_and_match(np, at91_ramc_of_match, &match) {
reset->ramc_lpr = (u32)match->data;
reset->ramc_base[idx] = devm_of_iomap(&pdev->dev, np, 0, NULL);
- if (!reset->ramc_base[idx]) {
+ if (IS_ERR(reset->ramc_base[idx])) {
dev_err(&pdev->dev, "Could not map ram controller address\n");
of_node_put(np);
return -ENODEV;
--
2.33.0