[PATCH][SRU Bionic] firmware: arm_sdei: Fix return value check in sdei_present_dt()

[dann frazier]

From: Wei Yongjun <weiyongjun1 at huawei.com>

BugLink: https://bugs.launchpad.net/bugs/1768663

In case of error, the function of_platform_device_create() returns
NULL pointer not ERR_PTR(). The IS_ERR() test in the return value
check should be replaced with NULL test.

Fixes: 677a60bd2003 ("firmware: arm_sdei: Discover SDEI support via ACPI")
Acked-by: James Morse <james.morse at arm.com>
Signed-off-by: Wei Yongjun <weiyongjun1 at huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
(cherry picked from commit 2f7aacf795e0192648b51674aef90e755e02408c)
Signed-off-by: dann frazier <dann.frazier at canonical.com>
---
 drivers/firmware/arm_sdei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index 8f6563c595e5..1ea71640fdc2 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -1023,7 +1023,7 @@ static bool __init sdei_present_dt(void)
 
 	pdev = of_platform_device_create(np, sdei_driver.driver.name, NULL);
 	of_node_put(np);
-	if (IS_ERR(pdev))
+	if (!pdev)
 		return false;
 
 	return true;
-- 
2.17.0