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From: Arnd Bergmann <arnd@arndb.de>
To: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>, Felix Fietkau <nbd@openwrt.org>,
	John Crispin <blogic@openwrt.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] net: mediatek: check device_reset return code
Date: Mon, 14 Mar 2016 15:07:12 +0100	[thread overview]
Message-ID: <1457964435-2945038-3-git-send-email-arnd@arndb.de> (raw)
In-Reply-To: <1457964435-2945038-1-git-send-email-arnd@arndb.de>

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 87f417712da0..1e6c5498bba9 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1676,7 +1676,9 @@ 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;
-- 
2.7.0

WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/3] net: mediatek: check device_reset return code
Date: Mon, 14 Mar 2016 15:07:12 +0100	[thread overview]
Message-ID: <1457964435-2945038-3-git-send-email-arnd@arndb.de> (raw)
In-Reply-To: <1457964435-2945038-1-git-send-email-arnd@arndb.de>

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 87f417712da0..1e6c5498bba9 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1676,7 +1676,9 @@ 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;
-- 
2.7.0

  parent reply	other threads:[~2016-03-14 14:08 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-14 14:07 [PATCH 1/3] net: mediatek: use dma_addr_t correctly Arnd Bergmann
2016-03-14 14:07 ` Arnd Bergmann
2016-03-14 14:07 ` Arnd Bergmann
2016-03-14 14:07 ` [PATCH 2/3] net: mediatek: remove incorrect dma_mask assignment Arnd Bergmann
2016-03-14 14:07   ` Arnd Bergmann
2016-03-14 14:07   ` Arnd Bergmann
2016-03-14 17:06   ` David Miller
2016-03-14 17:06     ` David Miller
2016-03-14 14:07 ` Arnd Bergmann [this message]
2016-03-14 14:07   ` [PATCH 3/3] net: mediatek: check device_reset return code Arnd Bergmann
2016-03-14 17:06   ` David Miller
2016-03-14 17:06     ` David Miller
2016-03-14 17:06 ` [PATCH 1/3] net: mediatek: use dma_addr_t correctly David Miller
2016-03-14 17:06   ` David Miller
2016-03-14 18:01 ` John Crispin
2016-03-14 18:01   ` John Crispin

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