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ide-cd: merge cdrom_start_read_continuation() and cdrom_start_rw_cont()

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* Add handling of write requests to cdrom_start_read_continuation(),
  rename it to cdrom_start_rw_cont() and remove no longer needed
  cdrom_start_write_cont().

* Remove redundant '(rq->sector & (sectors_per_frame - 1)' check.

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-02-01 23:09:27 +01:00
parent 94f5a86dc3
commit 29f3aaca3c
1 changed files with 35 additions and 39 deletions
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74
drivers/ide/ide-cd.c
View file

@ -800,39 +800,48 @@ static int cdrom_read_from_buffer (ide_drive_t *drive)
static ide_startstop_t cdrom_rw_intr(ide_drive_t *);
/*
* Routine to send a read packet command to the drive.
* This is usually called directly from cdrom_start_read.
* Routine to send a read/write packet command to the drive.
* This is usually called directly from cdrom_start_{read,write}().
* However, for drq_interrupt devices, it is called from an interrupt
* when the drive is ready to accept the command.
*/
static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned short sectors_per_frame;
int nskip;
sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
if (rq_data_dir(rq) == READ) {
unsigned short sectors_per_frame =
queue_hardsect_size(drive->queue) >> SECTOR_BITS;
int nskip = rq->sector & (sectors_per_frame - 1);
/* If the requested sector doesn't start on a cdrom block boundary,
we must adjust the start of the transfer so that it does,
and remember to skip the first few sectors.
If the CURRENT_NR_SECTORS field is larger than the size
of the buffer, it will mean that we're to skip a number
of sectors equal to the amount by which CURRENT_NR_SECTORS
is larger than the buffer size. */
nskip = rq->sector & (sectors_per_frame - 1);
if (nskip > 0) {
/* Sanity check... */
if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) &&
(rq->sector & (sectors_per_frame - 1))) {
printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n",
drive->name, rq->current_nr_sectors);
cdrom_end_request(drive, 0);
return ide_stopped;
/*
* If the requested sector doesn't start on a frame boundary,
* we must adjust the start of the transfer so that it does,
* and remember to skip the first few sectors.
*
* If the rq->current_nr_sectors field is larger than the size
* of the buffer, it will mean that we're to skip a number of
* sectors equal to the amount by which rq->current_nr_sectors
* is larger than the buffer size.
*/
if (nskip > 0) {
/* Sanity check... */
if (rq->current_nr_sectors !=
bio_cur_sectors(rq->bio)) {
printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
drive->name, __FUNCTION__,
rq->current_nr_sectors);
cdrom_end_request(drive, 0);
return ide_stopped;
}
rq->current_nr_sectors += nskip;
}
rq->current_nr_sectors += nskip;
}
#if 0
else
/* the immediate bit */
rq->cmd[1] = 1 << 3;
#endif
/* Set up the command */
rq->timeout = ATAPI_WAIT_PC;
@ -840,7 +849,6 @@ static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
return cdrom_transfer_packet_command(drive, rq, cdrom_rw_intr);
}
#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
@ -939,7 +947,7 @@ static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
info->dma = 0;
/* Start sending the read request to the drive. */
return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation);
return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
}
/****************************************************************************
@ -1375,18 +1383,6 @@ static ide_startstop_t cdrom_rw_intr(ide_drive_t *drive)
return ide_started;
}
static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
#if 0 /* the immediate bit */
rq->cmd[1] = 1 << 3;
#endif
rq->timeout = ATAPI_WAIT_PC;
return cdrom_transfer_packet_command(drive, rq, cdrom_rw_intr);
}
static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *info = drive->driver_data;
@ -1419,7 +1415,7 @@ static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
info->devinfo.media_written = 1;
/* Start sending the write request to the drive. */
return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
}
static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)