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Message-Id: <20210712060927.674143047@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:08:52 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Pavel Skripkin <paskripkin@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 372/593] net: ethernet: ezchip: fix error handling
From: Pavel Skripkin <paskripkin@...il.com>
[ Upstream commit 0de449d599594f5472e00267d651615c7f2c6c1d ]
As documented at drivers/base/platform.c for platform_get_irq:
* Gets an IRQ for a platform device and prints an error message if finding the
* IRQ fails. Device drivers should check the return value for errors so as to
* not pass a negative integer value to the request_irq() APIs.
So, the driver should check that platform_get_irq() return value
is _negative_, not that it's equal to zero, because -ENXIO (return
value from request_irq() if irq was not found) will
pass this check and it leads to passing negative irq to request_irq()
Fixes: 0dd077093636 ("NET: Add ezchip ethernet driver")
Signed-off-by: Pavel Skripkin <paskripkin@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/net/ethernet/ezchip/nps_enet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ezchip/nps_enet.c b/drivers/net/ethernet/ezchip/nps_enet.c
index 026a3ec19b6e..3d74401b4f10 100644
--- a/drivers/net/ethernet/ezchip/nps_enet.c
+++ b/drivers/net/ethernet/ezchip/nps_enet.c
@@ -610,7 +610,7 @@ static s32 nps_enet_probe(struct platform_device *pdev)
/* Get IRQ number */
priv->irq = platform_get_irq(pdev, 0);
- if (!priv->irq) {
+ if (priv->irq < 0) {
dev_err(dev, "failed to retrieve <irq Rx-Tx> value from device tree\n");
err = -ENODEV;
goto out_netdev;
--
2.30.2
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