diff options
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index da19f0bc8876..008388e82b5c 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/blk-mq.h> +#include <linux/delay.h> #include "blk.h" #include "blk-mq.h" #include "blk-mq-tag.h" @@ -354,6 +355,37 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, } EXPORT_SYMBOL(blk_mq_tagset_busy_iter); +static bool blk_mq_tagset_count_completed_rqs(struct request *rq, + void *data, bool reserved) +{ + unsigned *count = data; + + if (blk_mq_request_completed(rq)) + (*count)++; + return true; +} + +/** + * blk_mq_tagset_wait_completed_request - wait until all completed req's + * complete funtion is run + * @tagset: Tag set to drain completed request + * + * Note: This function has to be run after all IO queues are shutdown + */ +void blk_mq_tagset_wait_completed_request(struct blk_mq_tag_set *tagset) +{ + while (true) { + unsigned count = 0; + + blk_mq_tagset_busy_iter(tagset, + blk_mq_tagset_count_completed_rqs, &count); + if (!count) + break; + msleep(5); + } +} +EXPORT_SYMBOL(blk_mq_tagset_wait_completed_request); + /** * blk_mq_queue_tag_busy_iter - iterate over all requests with a driver tag * @q: Request queue to examine. |