Re: [PATCH v2] btrfs: clean up btrfs_dev_stat_inc() usage

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On Sat, Oct 21, 2017 at 01:45:33AM +0800, Anand Jain wrote:
> btrfs_end_bio() is using btrfs_dev_stat_inc() and then
> btrfs_dev_stat_print_on_error() separately instead use
> btrfs_dev_stat_inc_and_print() directly.
> 
> As of now there isn't any bio in btrfs which is - a non-empty write and
> also the REQ_PREFLUSH flag is set. So in actual the condition
>    if (bio->bi_opf & REQ_PREFLUSH)
> is never true in btrfs_end_bio(), and so there won't be any redundant error
> log by using btrfs_dev_stat_inc_and_print() separately one for write and
> another for flush.
> 
> This consolidation will help to add the device critical error handles in the
> function btrfs_dev_stat_inc_and_print() and which can be renamed as needed.
> 
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>

Reviewed-by: David Sterba <dsterba@xxxxxxxx>
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