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authorDan Williams <dan.j.williams@intel.com>2015-10-21 13:20:23 -0400
committerJens Axboe <axboe@fb.com>2015-10-21 14:43:44 -0600
commit5a48fc147d7f2718a5c7e73bc8c4067235791fc1 (patch)
tree5e13b5f618cd26419dc1cb53fe5f2fc48c4505a7 /block/blk-core.c
parentac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f (diff)
downloadop-kernel-dev-5a48fc147d7f2718a5c7e73bc8c4067235791fc1.zip
op-kernel-dev-5a48fc147d7f2718a5c7e73bc8c4067235791fc1.tar.gz
block: blk_flush_integrity() for bio-based drivers
Since they lack requests to pin the request_queue active, synchronous bio-based drivers may have in-flight integrity work from bio_integrity_endio() that is not flushed by blk_freeze_queue(). Flush that work to prevent races to free the queue and the final usage of the blk_integrity profile. This is temporary unless/until bio-based drivers start to generically take a q_usage_counter reference while a bio is in-flight. Cc: Martin K. Petersen <martin.petersen@oracle.com> [martin: fix the CONFIG_BLK_DEV_INTEGRITY=n case] Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 9b4d735..6ebe33e 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -561,6 +561,9 @@ void blk_cleanup_queue(struct request_queue *q)
queue_flag_set(QUEUE_FLAG_DEAD, q);
spin_unlock_irq(lock);
+ /* for synchronous bio-based driver finish in-flight integrity i/o */
+ blk_flush_integrity();
+
/* @q won't process any more request, flush async actions */
del_timer_sync(&q->backing_dev_info.laptop_mode_wb_timer);
blk_sync_queue(q);
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