scsi_track_queue_full — track QUEUE_FULL events to adjust queue depth
|struct scsi_device * sdev,|
SCSI Device in question
Current number of outstanding SCSI commands on this device, not counting the one returned as QUEUE_FULL.
This function will track successive QUEUE_FULL events on a specific SCSI device to determine if and when there is a need to adjust the queue depth on the device.
0 - No change needed, >0 - Adjust queue depth to this new depth, -1 - Drop back to untagged operation using host->cmd_per_lun as the untagged command depth