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authorChristoph Hellwig <hch@lst.de>2018-11-14 17:02:06 +0100
committerJens Axboe <axboe@kernel.dk>2018-11-15 12:13:18 -0700
commit39795d6534c6e698c4f9c065e0a5f4a2e5af7543 (patch)
tree2abe3b44e067bd726bba39786a4072709b96364c
parent079076b3416e78ba2bb3ce38e05e320c388c3120 (diff)
downloadlinux-39795d6534c6e698c4f9c065e0a5f4a2e5af7543.tar.bz2
block: don't hold the queue_lock over blk_abort_request
There is nothing it could synchronize against, so don't go through the pains of acquiring the lock. Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/blk-timeout.c2
-rw-r--r--drivers/ata/libata-eh.c4
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c5
-rw-r--r--drivers/scsi/libsas/sas_ata.c5
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c10
5 files changed, 4 insertions, 22 deletions
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 3b0179fbdd6a..124c26128bf6 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -75,7 +75,7 @@ ssize_t part_timeout_store(struct device *dev, struct device_attribute *attr,
* This function requests that the block layer start recovery for the
* request by deleting the timer and calling the q's timeout function.
* LLDDs who implement their own error recovery MAY ignore the timeout
- * event if they generated blk_abort_req. Must hold queue lock.
+ * event if they generated blk_abort_request.
*/
void blk_abort_request(struct request *req)
{
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 01306c018398..938ed513b070 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -919,8 +919,6 @@ static void ata_eh_set_pending(struct ata_port *ap, int fastdrain)
void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- struct request_queue *q = qc->scsicmd->device->request_queue;
- unsigned long flags;
WARN_ON(!ap->ops->error_handler);
@@ -932,9 +930,7 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
* Note that ATA_QCFLAG_FAILED is unconditionally set after
* this function completes.
*/
- spin_lock_irqsave(q->queue_lock, flags);
blk_abort_request(qc->scsicmd->request);
- spin_unlock_irqrestore(q->queue_lock, flags);
}
/**
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index a4c44db097e0..2b0ac9d01e51 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2770,10 +2770,7 @@ restart_eh:
blk_mq_quiesce_queue(dd->queue);
- spin_lock(dd->queue->queue_lock);
- blk_mq_tagset_busy_iter(&dd->tags,
- mtip_queue_cmd, dd);
- spin_unlock(dd->queue->queue_lock);
+ blk_mq_tagset_busy_iter(&dd->tags, mtip_queue_cmd, dd);
set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags);
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 4f6cdf53e913..c90b278cc28c 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -601,12 +601,7 @@ void sas_ata_task_abort(struct sas_task *task)
/* Bounce SCSI-initiated commands to the SCSI EH */
if (qc->scsicmd) {
- struct request_queue *q = qc->scsicmd->device->request_queue;
- unsigned long flags;
-
- spin_lock_irqsave(q->queue_lock, flags);
blk_abort_request(qc->scsicmd->request);
- spin_unlock_irqrestore(q->queue_lock, flags);
return;
}
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 33229348dcb6..af085432c5fe 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -930,16 +930,10 @@ void sas_task_abort(struct sas_task *task)
return;
}
- if (dev_is_sata(task->dev)) {
+ if (dev_is_sata(task->dev))
sas_ata_task_abort(task);
- } else {
- struct request_queue *q = sc->device->request_queue;
- unsigned long flags;
-
- spin_lock_irqsave(q->queue_lock, flags);
+ else
blk_abort_request(sc->request);
- spin_unlock_irqrestore(q->queue_lock, flags);
- }
}
void sas_target_destroy(struct scsi_target *starget)