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authorMing Lei <ming.lei@redhat.com>2017-11-04 21:21:12 +0300
committerJens Axboe <axboe@kernel.dk>2017-11-04 21:31:08 +0300
commit88022d7201e96b43f1754b0358fc6bcd8dbdcde1 (patch)
treeec0b9e2d1227a7101040f954aef16511a5b6fa46 /include/linux/blk-mq.h
parent826a70a08b1210bbfdbda812ab43eb986e25b5c2 (diff)
downloadlinux-88022d7201e96b43f1754b0358fc6bcd8dbdcde1.tar.xz
blk-mq: don't handle failure in .get_budget
It is enough to just check if we can get the budget via .get_budget(). And we don't need to deal with device state change in .get_budget(). For SCSI, one issue to be fixed is that we have to call scsi_mq_uninit_cmd() to free allocated ressources if SCSI device fails to handle the request. And it isn't enough to simply call blk_mq_end_request() to do that if this request is marked as RQF_DONTPREP. Fixes: 0df21c86bdbf(scsi: implement .get_budget and .put_budget for blk-mq) Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blk-mq.h')
-rw-r--r--include/linux/blk-mq.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index f2e3079eecdd..674641527da7 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -92,7 +92,7 @@ struct blk_mq_queue_data {
typedef blk_status_t (queue_rq_fn)(struct blk_mq_hw_ctx *,
const struct blk_mq_queue_data *);
-typedef blk_status_t (get_budget_fn)(struct blk_mq_hw_ctx *);
+typedef bool (get_budget_fn)(struct blk_mq_hw_ctx *);
typedef void (put_budget_fn)(struct blk_mq_hw_ctx *);
typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);