diff options
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index ae9bfc658203..86793259e541 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -13,6 +13,7 @@ #include <linux/blkdev.h> #include <linux/device.h> #include <linux/pm_runtime.h> +#include <linux/bsg.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> @@ -808,12 +809,15 @@ store_state_field(struct device *dev, struct device_attribute *attr, ret = scsi_device_set_state(sdev, state); /* * If the device state changes to SDEV_RUNNING, we need to - * rescan the device to revalidate it, and run the queue to - * avoid I/O hang. + * run the queue to avoid I/O hang, and rescan the device + * to revalidate it. Running the queue first is necessary + * because another thread may be waiting inside + * blk_mq_freeze_queue_wait() and because that call may be + * waiting for pending I/O to finish. */ if (ret == 0 && state == SDEV_RUNNING) { - scsi_rescan_device(dev); blk_mq_run_hw_queues(sdev->request_queue, true); + scsi_rescan_device(dev); } mutex_unlock(&sdev->state_mutex); @@ -1330,7 +1334,6 @@ static int scsi_target_add(struct scsi_target *starget) int scsi_sysfs_add_sdev(struct scsi_device *sdev) { int error, i; - struct request_queue *rq = sdev->request_queue; struct scsi_target *starget = sdev->sdev_target; error = scsi_target_add(starget); @@ -1369,12 +1372,19 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev) transport_add_device(&sdev->sdev_gendev); sdev->is_visible = 1; - error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev); - if (error) - /* we're treating error on bsg register as non-fatal, - * so pretend nothing went wrong */ - sdev_printk(KERN_INFO, sdev, - "Failed to register bsg queue, errno=%d\n", error); + if (IS_ENABLED(CONFIG_BLK_DEV_BSG)) { + sdev->bsg_dev = scsi_bsg_register_queue(sdev); + if (IS_ERR(sdev->bsg_dev)) { + /* + * We're treating error on bsg register as non-fatal, so + * pretend nothing went wrong. + */ + sdev_printk(KERN_INFO, sdev, + "Failed to register bsg queue, errno=%d\n", + error); + sdev->bsg_dev = NULL; + } + } /* add additional host specific attributes */ if (sdev->host->hostt->sdev_attrs) { @@ -1436,7 +1446,8 @@ void __scsi_remove_device(struct scsi_device *sdev) sysfs_remove_groups(&sdev->sdev_gendev.kobj, sdev->host->hostt->sdev_groups); - bsg_unregister_queue(sdev->request_queue); + if (IS_ENABLED(CONFIG_BLK_DEV_BSG) && sdev->bsg_dev) + bsg_unregister_queue(sdev->bsg_dev); device_unregister(&sdev->sdev_dev); transport_remove_device(dev); device_del(dev); |