Re: [PATCH v4 2/2] Staging: zram: Fix decrement of variable by calling bdput()

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On Tue, Oct 22, 2013 at 07:04:37PM +0530, Rashika Kheria wrote:
> As suggested by Jerome Marchand "The code in reset_store get the block device
> (bdget_disk()) but it does not put it (bdput()) when it's done using it.
> The usage count is therefor incremented but never decremented."
> 
> Hence, this patch introduces a call to bdput() to decrement the variable after usage.
> 
> Signed-off-by: Rashika Kheria <rashika.kheria@xxxxxxxxx>
> ---
>  drivers/staging/zram/zram_drv.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
> index 8679a06..2cb33ab 100644
> --- a/drivers/staging/zram/zram_drv.c
> +++ b/drivers/staging/zram/zram_drv.c
> @@ -664,6 +664,7 @@ static ssize_t reset_store(struct device *dev,
>  
>  	/* Make sure all pending I/O is finished */
>  	fsync_bdev(bdev);
> +	bdput(bdev);

We should handle error case, too.
And please put this bug fix patch ahead of [1/2] because this patch is
more real bug fix than [1/2] which is just warning of smatch.

Thanks.

-- 
Kind regards,
Minchan Kim
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