diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index fc8f394eb854..f0eb55744513 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -3023,24 +3023,22 @@ static int scsi_internal_device_block(struct scsi_device *sdev) } /** - * scsi_internal_device_unblock - resume a device after a block request + * scsi_internal_device_unblock_nowait - resume a device after a block request * @sdev: device to resume - * @new_state: state to set devices to after unblocking + * @new_state: state to set the device to after unblocking * - * Called by scsi lld's or the midlayer to restart the device queue - * for the previously suspended scsi device. Called from interrupt or - * normal process context. + * Restart the device queue for a previously suspended SCSI device. Does not + * sleep. * - * Returns zero if successful or error if not. + * Returns zero if successful or a negative error code upon failure. * - * Notes: - * This routine transitions the device to the SDEV_RUNNING state - * or to one of the offline states (which must be a legal transition) - * allowing the midlayer to goose the queue for this device. + * Notes: + * This routine transitions the device to the SDEV_RUNNING state or to one of + * the offline states (which must be a legal transition) allowing the midlayer + * to goose the queue for this device. */ -int -scsi_internal_device_unblock(struct scsi_device *sdev, - enum scsi_device_state new_state) +int scsi_internal_device_unblock_nowait(struct scsi_device *sdev, + enum scsi_device_state new_state) { struct request_queue *q = sdev->request_queue; unsigned long flags; @@ -3072,7 +3070,27 @@ scsi_internal_device_unblock(struct scsi_device *sdev, return 0; } -EXPORT_SYMBOL_GPL(scsi_internal_device_unblock); +EXPORT_SYMBOL_GPL(scsi_internal_device_unblock_nowait); + +/** + * scsi_internal_device_unblock - resume a device after a block request + * @sdev: device to resume + * @new_state: state to set the device to after unblocking + * + * Restart the device queue for a previously suspended SCSI device. May sleep. + * + * Returns zero if successful or a negative error code upon failure. + * + * Notes: + * This routine transitions the device to the SDEV_RUNNING state or to one of + * the offline states (which must be a legal transition) allowing the midlayer + * to goose the queue for this device. + */ +static int scsi_internal_device_unblock(struct scsi_device *sdev, + enum scsi_device_state new_state) +{ + return scsi_internal_device_unblock_nowait(sdev, new_state); +} static void device_block(struct scsi_device *sdev, void *data) |