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| author |   Jens Axboe <axboe@kernel.dk> | 2019-01-30 08:41:40 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-01-31 08:25:09 -0700 |
| commit | 9a6d5488002fdca7134a0e59b0ae252f61042810 (patch) | |
| tree | da65822cbac6defce676db665ea2ffb4cb89903b /include/linux/ide.h | |
| parent | blk-mq: fix a hung issue when fsync (diff) | |
| download | wireguard-linux-9a6d5488002fdca7134a0e59b0ae252f61042810.tar.xz wireguard-linux-9a6d5488002fdca7134a0e59b0ae252f61042810.zip | |
ide: ensure atapi sense request aren't preempted
There's an issue with how sense requests are handled in IDE. If ide-cd
encounters an error, it queues a sense request. With how IDE request
handling is done, this is the next request we need to handle. But it's
impossible to guarantee this, as another request could come in between
the sense being queued, and ->queue_rq() being run and handling it. If
that request ALSO fails, then we attempt to doubly queue the single
sense request we have.
Since we only support one active request at the time, defer request
processing when a sense request is queued.
Fixes: 600335205b8d "ide: convert to blk-mq"
Reported-by: He Zhe <zhe.he@windriver.com>
Tested-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/ide.h')
| -rw-r--r-- | include/linux/ide.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ide.h b/include/linux/ide.h index e7d29ae633cd..971cf76a78a0 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -615,6 +615,7 @@ struct ide_drive_s { /* current sense rq and buffer */ bool sense_rq_armed; + bool sense_rq_active; struct request *sense_rq; struct request_sense sense_data; @@ -1219,6 +1220,7 @@ extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout); extern void ide_timer_expiry(struct timer_list *t); extern irqreturn_t ide_intr(int irq, void *dev_id); extern blk_status_t ide_queue_rq(struct blk_mq_hw_ctx *, const struct blk_mq_queue_data *); +extern blk_status_t ide_issue_rq(ide_drive_t *, struct request *, bool); extern void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq); void ide_init_disk(struct gendisk *, ide_drive_t *); |