On Thu, Feb 14, 2013 at 12:28:18PM +0100, Cong Ding wrote:
> If it goes to eclk through line 1107, the variable res would be NULL. It will
> cause a null pointer dereference error if we call release_mem_region. The
> correct way should be using devm_kzalloc rather than kzalloc to allocate
> memory.
>
> Signed-off-by: Cong Ding <dinggnu@xxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-pxa.c | 22 ++++++++--------------
> 1 file changed, 8 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index 1034d93..dd2d640 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -1094,29 +1094,23 @@ static int i2c_pxa_probe(struct platform_device *dev)
> struct resource *res = NULL;
> int ret, irq;
>
> - i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
> - if (!i2c) {
> - ret = -ENOMEM;
> - goto emalloc;
> - }
> + i2c = devm_kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
You are using devm_kzalloc here but plain kfree is used later. This
won't work.
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