linux-kernel - [PATCH 2/2] DMA: PL330: Check the pointer returned by kzalloc

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Message-Id: <1347875423-7970-2-git-send-email-sachin.kamat@linaro.org>
Date:	Mon, 17 Sep 2012 15:20:23 +0530
From:	Sachin Kamat <sachin.kamat@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	vinod.koul@...el.com, jassisinghbrar@...il.com,
	sachin.kamat@...aro.org, patches@...aro.org
Subject: [PATCH 2/2] DMA: PL330: Check the pointer returned by kzalloc

kzalloc could return NULL. Hence add a check to avoid
NULL pointer dereference.

Signed-off-by: Sachin Kamat <sachin.kamat@...aro.org>
---
 drivers/dma/pl330.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 018a445..5d3bbcd 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2930,6 +2930,11 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 		num_chan = max_t(int, pi->pcfg.num_peri, pi->pcfg.num_chan);
 
 	pdmac->peripherals = kzalloc(num_chan * sizeof(*pch), GFP_KERNEL);
+	if (!pdmac->peripherals) {
+		ret = -ENOMEM;
+		dev_err(&adev->dev, "unable to allocate pdmac->peripherals\n");
+		goto probe_err5;
+	}
 
 	for (i = 0; i < num_chan; i++) {
 		pch = &pdmac->peripherals[i];
-- 
1.7.4.1

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