Messages in this thread Patch in this message | | | From | Maxim Levitsky <> | Subject | [PATCH 06/17] blktrans: flush all requests before we remove the device | Date | Sat, 30 Jan 2010 17:02:37 +0200 |
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Flush all requests, so we can be sure we don't deadlock the system later when we remove the disk queue.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> --- drivers/mtd/mtd_blkdevs.c | 14 +++++++++++++- 1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 841c6ae..a65eb07 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -115,7 +115,13 @@ static int mtd_blktrans_thread(void *arg) static void mtd_blktrans_request(struct request_queue *rq) { struct mtd_blktrans_dev *dev = rq->queuedata; - wake_up_process(dev->thread); + struct request *req = NULL; + + if (dev->deleted) + while ((req = blk_fetch_request(rq)) != NULL) + __blk_end_request_all(req, -ENODEV); + else + wake_up_process(dev->thread); } @@ -358,6 +364,8 @@ error1: int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old) { + unsigned long flags; + if (mutex_trylock(&mtd_table_mutex)) { mutex_unlock(&mtd_table_mutex); BUG(); @@ -368,7 +376,11 @@ int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old) /* stop new requests to arrive */ del_gendisk(old->disk); + /* flush current requests */ + spin_lock_irqsave(&old->queue_lock, flags); old->deleted = 1; + blk_start_queue(old->rq); + spin_unlock_irqrestore(&old->queue_lock, flags); /* Stop the thread */ kthread_stop(old->thread); -- 1.6.3.3
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