platform/x86: mlx-platform: Fix an ERR_PTR vs NULL issue

devm_ioport_map() returns NULL on error but we accidentally check for
error pointers instead.

Fixes: c6acad68eb2d ("platform/mellanox: mlxreg-hotplug: Modify to use a regmap interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Vadim Pasternak <vadimp@melanox.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index dfecba4407ac..27de29961f5e 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -522,8 +522,8 @@ static int __init mlxplat_init(void)
 
         mlxplat_mlxcpld_regmap_ctx.base = devm_ioport_map(&mlxplat_dev->dev,
                                mlxplat_lpc_resources[1].start, 1);
-        if (IS_ERR(mlxplat_mlxcpld_regmap_ctx.base)) {
-                err = PTR_ERR(mlxplat_mlxcpld_regmap_ctx.base);
+        if (!mlxplat_mlxcpld_regmap_ctx.base) {
+                err = -ENOMEM;
                 goto fail_platform_mux_register;
         }