Re: [PATCH v6 3/3] Staging: zram: Fix decrement of variable bycalling bdput()
From: Minchan Kim
Date: Mon Oct 28 2013 - 20:47:22 EST
On Mon, Oct 28, 2013 at 05:54:39PM +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>
I think this patch is for stable, too.
So, please read my previous reply.
And please relocate this with [2/3] and do bdput in all of error cases
> 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 9027975..98dac15 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 */
> + bdput(bdev);
> zram_reset_device(zram, true);
> return len;
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