--- /dev/null
+From 12c2e32f14da857b58af281b029d4549d24c3292 Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
+Date: Tue, 12 Jul 2016 00:17:28 +0000
+Subject: [PATCH] net: ethernet: bgmac: Fix return value check in bgmac_probe()
+
+In case of error, the function devm_ioremap_resource() returns ERR_PTR()
+and never returns NULL. The NULL test in the return value check should be
+replaced with IS_ERR().
+
+Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/ethernet/broadcom/bgmac-platform.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/broadcom/bgmac-platform.c
++++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
+@@ -141,7 +141,7 @@ static int bgmac_probe(struct platform_d
+ }
+
+ bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
+- if (!bgmac->plat.idm_base) {
++ if (IS_ERR(bgmac->plat.idm_base)) {
+ dev_err(&pdev->dev, "Unable to map idm resource\n");
+ return PTR_ERR(bgmac->plat.idm_base);
+ }