1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0064-net-mediatek-check-device_reset-return-code.patch b/target/linux/mediatek/patches-4.4/0064-net-mediatek-check-device_reset-return-code.patch
new file mode 100644
index 0000000000..06aab2b205
--- /dev/null
+++ b/target/linux/mediatek/patches-4.4/0064-net-mediatek-check-device_reset-return-code.patch
@@ -0,0 +1,38 @@
+From e1e7d841480b3a0febdb999fd1c6c4213ee18ea7 Mon Sep 17 00:00:00 2001
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Mon, 14 Mar 2016 15:07:12 +0100
+Subject: [PATCH 64/78] net: mediatek: check device_reset return code
+
+The device_reset() function may fail, so we have to check
+its return value, e.g. to make deferred probing work correctly.
+gcc warns about it because of the warn_unused_result attribute:
+
+drivers/net/ethernet/mediatek/mtk_eth_soc.c: In function 'mtk_probe':
+drivers/net/ethernet/mediatek/mtk_eth_soc.c:1679:2: error: ignoring return value of 'device_reset', declared with attribute warn_unused_result [-Werror=unused-result]
+
+This adds the trivial error check to propagate the return value
+to the generic platform device probe code.
+
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c |    4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+index fcd4ed7..7f2126b 100644
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -1678,7 +1678,9 @@ static int mtk_probe(struct platform_device *pdev)
+ 	struct mtk_eth *eth;
+ 	int err;
+ 
+-	device_reset(&pdev->dev);
++	err = device_reset(&pdev->dev);
++	if (err)
++		return err;
+ 
+ 	match = of_match_device(of_mtk_match, &pdev->dev);
+ 	soc = (struct mtk_soc_data *)match->data;
+-- 
+1.7.10.4
+