From: Tang Junhui <tang.junhui@xxxxxxxxxx>
>The function cached_dev_make_request() and flash_dev_make_request() call
>generic_start_io_acct() with (struct bcache_device)->disk when they start a
>closure. Then the function bio_complete() calls generic_end_io_acct() with
>(struct search)->orig_bio->bi_disk when the closure has done.
>Since the `bi_disk` is not the bcache device, the generic_end_io_acct() is
>called with a wrong device queue.
>
>It causes the "inflight" (in struct hd_struct) counter keep increasing
>without decreasing.
>
>This patch fix the problem by calling generic_end_io_acct() with
>(struct bcache_device)->disk.
>
>Signed-off-by: Zhai Zhaoxuan <kxuanobj@xxxxxxxxx>
>---
> drivers/md/bcache/request.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
>index 643c3021624f..83de85fe4542 100644
>--- a/drivers/md/bcache/request.c
>+++ b/drivers/md/bcache/request.c
>@@ -611,8 +611,8 @@ static void request_endio(struct bio *bio)
> static void bio_complete(struct search *s)
> {
> if (s->orig_bio) {
>- struct request_queue *q = s->orig_bio->bi_disk->queue;
>- generic_end_io_acct(q, bio_data_dir(s->orig_bio),
>+ generic_end_io_acct(s->d->disk->queue,
>+ bio_data_dir(s->orig_bio),
> &s->d->disk->part0, s->start_time);
>
> trace_bcache_request_end(s->d, s->orig_bio);
>--
>2.15.1
LGTM.
Reviewed-by: Tang Junhui <tang.junhui@xxxxxxxxxx>
Thanks,
Tang Junhui
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