diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index e7686500e9d..98ee55ced59 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1250,6 +1250,7 @@ int scsi_prep_state_check(struct scsi_device *sdev, struct request *req) break; case SDEV_QUIESCE: case SDEV_BLOCK: + case SDEV_CREATED_BLOCK: /* * If the devices is blocked we defer normal commands. */ @@ -2073,10 +2074,13 @@ scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state) switch (state) { case SDEV_CREATED: - /* There are no legal states that come back to - * created. This is the manually initialised start - * state */ - goto illegal; + switch (oldstate) { + case SDEV_CREATED_BLOCK: + break; + default: + goto illegal; + } + break; case SDEV_RUNNING: switch (oldstate) { @@ -2114,8 +2118,17 @@ scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state) case SDEV_BLOCK: switch (oldstate) { - case SDEV_CREATED: case SDEV_RUNNING: + case SDEV_CREATED_BLOCK: + break; + default: + goto illegal; + } + break; + + case SDEV_CREATED_BLOCK: + switch (oldstate) { + case SDEV_CREATED: break; default: goto illegal; @@ -2403,8 +2416,12 @@ scsi_internal_device_block(struct scsi_device *sdev) int err = 0; err = scsi_device_set_state(sdev, SDEV_BLOCK); - if (err) - return err; + if (err) { + err = scsi_device_set_state(sdev, SDEV_CREATED_BLOCK); + + if (err) + return err; + } /* * The device has transitioned to SDEV_BLOCK. Stop the @@ -2447,8 +2464,12 @@ scsi_internal_device_unblock(struct scsi_device *sdev) * and goose the device queue if successful. */ err = scsi_device_set_state(sdev, SDEV_RUNNING); - if (err) - return err; + if (err) { + err = scsi_device_set_state(sdev, SDEV_CREATED); + + if (err) + return err; + } spin_lock_irqsave(q->queue_lock, flags); blk_start_queue(q); |