linux-kernel - RE: [PATCH] Check kmalloc return value before use the buffer

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Message-ID: <CEE6BB42CAD6E947908279175AF8470A025A68D366@EXDCVYMBSTM006.EQ1STM.local>
Date:	Fri, 7 May 2010 20:57:39 +0200
From:	Linus WALLEIJ <linus.walleij@...ricsson.com>
To:	Steven Liu <lingjiujianke@...il.com>,
	"nigel@...onice.net" <nigel@...onice.net>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] Check kmalloc return value before use the buffer

[Steven]

> the code in arch/arm/mach-u300/dummyspichip.c is
> 
>     bigtxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL);
>     if (bigtxbuf_virtual == NULL) {
>         status = -ENOMEM;
>         goto out;
>     }
>     bigrxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL);
> 
> 
> if kmalloc memory space for bigrxbuf_virtual is NULL, when it have
> kmalloc DMA_TEST_SIZE memory space for bigtxbuf_virtual,so ,if kmalloc
> memory for bigtxbuf_virtual success and kmalloc memory for
> bigrxbuf_virtual faild,i think we must kfree  bigtxbuf_virtual memory

Ha, I also misread tx for rx, sorry.

Acked-by: Linus Walleij <linus.walleij@...ricsson.com>

Yours,
Linus Walleij
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