[PATCH] irqchip/aslint-sswi: fix error checking

[Vladimir Kondratiev]

of_io_request_and_map() returns IOMEM_ERR_PTR() on failure which is
non-NULL.

Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@xxxxxxxxxxxx>
---
 drivers/irqchip/irq-aclint-sswi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-aclint-sswi.c b/drivers/irqchip/irq-aclint-sswi.c
index 325501f34a9b..ca06efd86fa1 100644
--- a/drivers/irqchip/irq-aclint-sswi.c
+++ b/drivers/irqchip/irq-aclint-sswi.c
@@ -110,8 +110,10 @@ static int __init aclint_sswi_probe(struct fwnode_handle *fwnode)
 		return -EINVAL;
 
 	reg = of_io_request_and_map(to_of_node(fwnode), 0, NULL);
-	if (!reg)
-		return -ENOMEM;
+	if (IS_ERR(reg)) {
+		pr_err("%pfwP: Failed to map MMIO region\n", fwnode);
+		return PTR_ERR(reg);
+	}
 
 	/* Parse SSWI setting */
 	rc = aclint_sswi_parse_irq(fwnode, reg);
-- 
2.43.0