linux-kernel - [PATCH v2 10/12] staging: fsl-mc: Fixed WARN_ON() in fsl_mc_resource_pool_remove

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Message-ID: <1444852311-673-11-git-send-email-German.Rivera@freescale.com>
Date:	Wed, 14 Oct 2015 14:51:49 -0500
From:	"J. German Rivera" <German.Rivera@...escale.com>
To:	<gregkh@...uxfoundation.org>, <arnd@...db.de>,
	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC:	<stuart.yoder@...escale.com>, <itai.katz@...escale.com>,
	<lijun.pan@...escale.com>, <leoli@...escale.com>,
	<scottwood@...escale.com>, <agraf@...e.de>,
	<bhamciu1@...escale.com>, <R89243@...escale.com>,
	<bhupesh.sharma@...escale.com>, <nir.erez@...escale.com>,
	<richard.schmitt@...escale.com>, <dan.carpenter@...cle.com>,
	"J. German Rivera" <German.Rivera@...escale.com>
Subject: [PATCH v2 10/12] staging: fsl-mc: Fixed WARN_ON() in fsl_mc_resource_pool_remove_device

Check that resource is not NULL before de-referencing it.
---
CHANGE HISTORY

Changes in v2: none

 drivers/staging/fsl-mc/bus/mc-allocator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c
index a45293b..88d1857 100644
--- a/drivers/staging/fsl-mc/bus/mc-allocator.c
+++ b/drivers/staging/fsl-mc/bus/mc-allocator.c
@@ -111,7 +111,7 @@ static int __must_check fsl_mc_resource_pool_remove_device(struct fsl_mc_device
 		goto out;

 	resource = mc_dev->resource;
-	if (WARN_ON(resource->data != mc_dev))
+	if (WARN_ON(!resource || resource->data != mc_dev))
 		goto out;

 	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
--
2.3.3

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