NAME
scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth
SYNOPSIS
int scsi_track_queue_full(struct scsi_device * sdev, int depth);
ARGUMENTS
sdev
SCSI Device in question
depth
Current number of outstanding SCSI commands on this device, not counting the one returned as QUEUE_FULL.
DESCRIPTION
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.
RETURN
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
Lock Status: None held on entry
NOTES
Low level drivers may call this at any time and we will do “The Right Thing.” We are interrupt context safe.
AUTHORS
James Bottomley <[email protected]>
Author.
Rob Landley <[email protected]>
Author.