Thread (4 messages) 4 messages, 3 authors, 2013-10-30

Re: [PATCH 1/2] sh_eth: check platform data pointer

From: Simon Horman <horms@verge.net.au>
Date: 2013-09-04 06:48:34
Also in: linux-sh

On Sat, Aug 31, 2013 at 04:23:29AM +0400, Sergei Shtylyov wrote:
Check the platform data pointer before dereferencing it and error out of the
probe() method if it's NULL.

This has additional effect of preventing kernel oops with outdated platform data
containing zero PHY address instead (such as on SolutionEngine7710).

Signed-off-by: Sergei Shtylyov <redacted>

Reviewed-by: Simon Horman <horms@verge.net.au>
quoted hunk ↗ jump to hunk
---
This patch is against Dave's 'net-next.git' repo.

 drivers/net/ethernet/renesas/sh_eth.c |    6 ++++++
 1 file changed, 6 insertions(+)

Index: net-next/drivers/net/ethernet/renesas/sh_eth.c
===================================================================
--- net-next.orig/drivers/net/ethernet/renesas/sh_eth.c
+++ net-next/drivers/net/ethernet/renesas/sh_eth.c
@@ -2653,6 +2653,12 @@ static int sh_eth_drv_probe(struct platf
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_resume(&pdev->dev);
 
+	if (!pd) {
+		dev_err(&pdev->dev, "no platform data\n");
+		ret = -EINVAL;
+		goto out_release;
+	}
+
 	/* get PHY ID */
 	mdp->phy_id = pd->phy;
 	mdp->phy_interface = pd->phy_interface;
--
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