[PATCH v2] hwmon: fix a NULL vs IS_ERR_OR_NULL() check in xgene_hwmon_probe()

[xinghuo . chen]

From: Xinghuo Chen <xinghuo.chen@xxxxxxxxxxx>

The devm_memremap() function returns error pointers on error,
it doesn't return NULL.

Fixes: c7cefce03e69 ("hwmon: (xgene) access mailbox as RAM")
Signed-off-by: Xinghuo Chen <xinghuo.chen@xxxxxxxxxxx>
---
v1 -> v2:
Use IS_ERR_OR_NULL() instead of IS_ERR() as devm_ioremap()
return NULL on error.

Link to v1: https://lore.kernel.org/all/tencent_370DBB5BD8EF699EC030ACA74BCB440FFA0A@xxxxxx
---
 drivers/hwmon/xgene-hwmon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
index 1e3bd129a922..7087197383c9 100644
--- a/drivers/hwmon/xgene-hwmon.c
+++ b/drivers/hwmon/xgene-hwmon.c
@@ -706,7 +706,7 @@ static int xgene_hwmon_probe(struct platform_device *pdev)
 			goto out;
 		}
 
-		if (!ctx->pcc_comm_addr) {
+		if (IS_ERR_OR_NULL(ctx->pcc_comm_addr)) {
 			dev_err(&pdev->dev,
 				"Failed to ioremap PCC comm region\n");
 			rc = -ENOMEM;
-- 
2.17.1