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[SCSI] Get rid of scsi_cmnd->done

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The ULD ->done callback moves into the scsi_driver.  By moving the call
to scsi_io_completion() from scsi_blk_pc_done() to scsi_finish_command(),
we can eliminate the latter entirely.  By returning 'good_bytes' from
the ->done callback (rather than invoking scsi_io_completion()), we can
stop exporting scsi_io_completion().

Also move the prototypes from sd.h to sd.c as they're all internal anyway.
Rename sd_rw_intr to sd_done and rw_intr to sr_done.

Inspired-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox
2007-09-25 12:42:04 -04:00
committed by James Bottomley
parent 687d2bc487
commit 6f5391c283
9 changed files with 43 additions and 58 deletions
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21
drivers/scsi/sr.c
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@ -78,6 +78,7 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);
static int sr_probe(struct device *);
static int sr_remove(struct device *);
static int sr_done(struct scsi_cmnd *);
static struct scsi_driver sr_template = {
.owner = THIS_MODULE,
@ -86,6 +87,7 @@ static struct scsi_driver sr_template = {
.probe = sr_probe,
.remove = sr_remove,
},
.done = sr_done,
};
static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
@ -208,12 +210,12 @@ static int sr_media_change(struct cdrom_device_info *cdi, int slot)
}
/*
* rw_intr is the interrupt routine for the device driver.
* sr_done is the interrupt routine for the device driver.
*
* It will be notified on the end of a SCSI read / write, and will take on
* It will be notified on the end of a SCSI read / write, and will take one
* of several actions based on success or failure.
*/
static void rw_intr(struct scsi_cmnd * SCpnt)
static int sr_done(struct scsi_cmnd *SCpnt)
{
int result = SCpnt->result;
int this_count = SCpnt->request_bufflen;
@ -286,12 +288,7 @@ static void rw_intr(struct scsi_cmnd * SCpnt)
}
}
/*
* This calls the generic completion function, now that we know
* how many actual sectors finished, and how many sectors we need
* to say have failed.
*/
scsi_io_completion(SCpnt, good_bytes);
return good_bytes;
}
static int sr_prep_fn(struct request_queue *q, struct request *rq)
@ -427,12 +424,6 @@ static int sr_prep_fn(struct request_queue *q, struct request *rq)
SCpnt->allowed = MAX_RETRIES;
SCpnt->timeout_per_command = timeout;
/*
* This is the completion routine we use. This is matched in terms
* of capability to this function.
*/
SCpnt->done = rw_intr;
/*
* This indicates that the command is ready from our end to be
* queued.