From mboxrd@z Thu Jan 1 00:00:00 1970 From: dan.carpenter@oracle.com (Dan Carpenter) Date: Thu, 15 May 2014 23:32:13 +0300 Subject: [PATCH] ARM: imx: clean up error handling In-Reply-To: <1400181871-10325-1-git-send-email-emilgoode@gmail.com> References: <1400181871-10325-1-git-send-email-emilgoode@gmail.com> Message-ID: <20140515203212.GD8897@mwanda> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, May 15, 2014 at 09:24:30PM +0200, Emil Goode wrote: > If we fail to allocate struct platform_device pdev we > dereference it after the goto label err. > > I have rearranged the error handling a bit to fix the issue > and also make it more clear. > > Signed-off-by: Emil Goode > --- > arch/arm/mach-imx/devices/platform-ipu-core.c | 22 +++++++++++++--------- > 1 file changed, 13 insertions(+), 9 deletions(-) > > diff --git a/arch/arm/mach-imx/devices/platform-ipu-core.c b/arch/arm/mach-imx/devices/platform-ipu-core.c > index fc4dd7c..14d61d9 100644 > --- a/arch/arm/mach-imx/devices/platform-ipu-core.c > +++ b/arch/arm/mach-imx/devices/platform-ipu-core.c > @@ -77,34 +77,38 @@ struct platform_device *__init imx_alloc_mx3_camera( > > pdev = platform_device_alloc("mx3-camera", 0); > if (!pdev) > - goto err; > + return ERR_PTR(ret); It's more readable to say "return ERR_PTR(-ENOMEM);". This patch is great but the subject should say "fix" and not "clean up" since it fixes a NULL dereference bug. The people who call their checkpatch.pl clean ups "fixes" are also doing it wrong but those are newbies and not worth educating. regards, dan carpenter