diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2017-11-29 15:40:59 +0200 |
---|---|---|
committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:28:17 +0800 |
commit | 867d450251e5fc0a47a3d7191163d370ebacb8ec (patch) | |
tree | 28c901562f1792baab772e327dbbf12ba067176e /drivers/mmc/core | |
parent | d51b98835feb1415947eb339cd5a08a405c0ed3d (diff) |
mmc: block: Simplify cleaning up the queue
Use blk_cleanup_queue() to shutdown the queue when the driver is removed,
and instead get an extra reference to the queue to prevent the queue being
freed before the final mmc_blk_put().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
(cherry picked from commit 41e3efd07d5a02c80f503e29d755aa1bbb4245de)
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r-- | drivers/mmc/core/block.c | 17 | ||||
-rw-r--r-- | drivers/mmc/core/queue.c | 2 |
2 files changed, 14 insertions, 5 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 0b7c8e14a7b2..69be56c5636a 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -161,7 +161,7 @@ static void mmc_blk_put(struct mmc_blk_data *md) md->usage--; if (md->usage == 0) { int devidx = mmc_get_devidx(md->disk); - blk_cleanup_queue(md->queue.queue); + blk_put_queue(md->queue.queue); ida_simple_remove(&mmc_blk_ida, devidx); put_disk(md->disk); kfree(md); @@ -2143,6 +2143,17 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, md->queue.blkdata = md; + /* + * Keep an extra reference to the queue so that we can shutdown the + * queue (i.e. call blk_cleanup_queue()) while there are still + * references to the 'md'. The corresponding blk_put_queue() is in + * mmc_blk_put(). + */ + if (!blk_get_queue(md->queue.queue)) { + mmc_cleanup_queue(&md->queue); + goto err_putdisk; + } + md->disk->major = MMC_BLOCK_MAJOR; md->disk->first_minor = devidx * perdev_minors; md->disk->fops = &mmc_bdops; @@ -2293,10 +2304,6 @@ static void mmc_blk_remove_req(struct mmc_blk_data *md) * from being accepted. */ card = md->queue.card; - spin_lock_irq(md->queue.queue->queue_lock); - queue_flag_set(QUEUE_FLAG_BYPASS, md->queue.queue); - spin_unlock_irq(md->queue.queue->queue_lock); - blk_set_queue_dying(md->queue.queue); mmc_cleanup_queue(&md->queue); if (md->disk->flags & GENHD_FL_UP) { device_remove_file(disk_to_dev(md->disk), &md->force_ro); diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c index dbbb38c22608..0fc2d9e260e7 100644 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -268,6 +268,8 @@ void mmc_cleanup_queue(struct mmc_queue *mq) blk_start_queue(q); spin_unlock_irqrestore(q->queue_lock, flags); + blk_cleanup_queue(q); + mq->card = NULL; } EXPORT_SYMBOL(mmc_cleanup_queue); |