From a9face899413f468460219c79503c091c4d362cb Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 9 May 2022 12:08:28 +0300
Subject: [PATCH] usb: typec: ucsi: acpi: fix a NULL vs IS_ERR() check in probe
The devm_memremap() function never returns NULL. It returns error
pointers.
Fixes: cdc3d2abf438 ("usb: typec: ucsi: acpi: Map the mailbox with memremap()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/usb/typec/ucsi/ucsi_acpi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c
index 7455e3aff2be0..8873c1644a295 100644
--- a/drivers/usb/typec/ucsi/ucsi_acpi.c
+++ b/drivers/usb/typec/ucsi/ucsi_acpi.c
@@ -133,8 +133,8 @@ static int ucsi_acpi_probe(struct platform_device *pdev)
}
ua->base = devm_memremap(&pdev->dev, res->start, resource_size(res), MEMREMAP_WB);
- if (!ua->base)
- return -ENOMEM;
+ if (IS_ERR(ua->base))
+ return PTR_ERR(ua->base);
ret = guid_parse(UCSI_DSM_UUID, &ua->guid);
if (ret)