linux-kernel - [PATCH] Check kmalloc return value before use the bigrxbuf_virtual and kfree the bigtxbuf

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Message-ID: <x2ybd0d95d71005070304wf9c7235eqedf0d0c37dffe316@mail.gmail.com>
Date:	Fri, 7 May 2010 18:04:09 +0800
From:	Steven Liu <lingjiujianke@...il.com>
To:	Nigel Cunningham <nigel@...onice.net>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	lgy123616 sadas <lingjiujianke@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Check kmalloc return value before use the bigrxbuf_virtual 
	and kfree the bigtxbuf_virtual

Check kmalloc return value before use the bigrxbuf_virtual ,when
bigrxbuf_virtual is NULL, kfree  bigtxbuf_virtual and out

Signed-off-by: LiuQi <lingjiujianke@...il.com>
---
 arch/arm/mach-u300/dummyspichip.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-u300/dummyspichip.c
b/arch/arm/mach-u300/dummyspichip.c
index 5f55012..df19f9b 100644
--- a/arch/arm/mach-u300/dummyspichip.c
+++ b/arch/arm/mach-u300/dummyspichip.c
@@ -64,6 +64,11 @@ static ssize_t dummy_looptest(struct device *dev,
 		goto out;
 	}
 	bigrxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL);
+	if (bigrxbuf_virtual == NULL) {
+		status = -ENOMEM;
+		kfree(bigtxbuf_virtual);
+		goto out;
+	}

 	/* Fill TXBUF with some happy pattern */
 	memset(bigtxbuf_virtual, 0xAA, DMA_TEST_SIZE);
-- 
1.6.0.3
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