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ide-cd: convert cdrom_decode_status() to use switch statements 

Based on earlier work by Borislav Petkov.

Convert cdrom_decode_status() to use switch statements in
preparation to unify handling of fs and pc requests.

While at it:
- remove superfluous comments and do minor CodingStyle fixups

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-04-08 14:12:53 +02:00
parent 98036abf31
commit e01f251fd0
1 changed files with 32 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
drivers/ide/ide-cd.c
View File

@ -340,15 +340,14 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
if (blk_pc_request(rq) && !rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
/* check for tray open */
if (sense_key == NOT_READY) {
switch (sense_key) {
case NOT_READY:
cdrom_saw_media_change(drive);
} else if (sense_key == UNIT_ATTENTION) {
/* check for media change */
break;
case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
return 0;
} else if (sense_key == ILLEGAL_REQUEST &&
rq->cmd[0] == GPCMD_START_STOP_UNIT) {
case ILLEGAL_REQUEST:
/*
* Don't print error message for this condition--
* SFF8090i indicates that 5/24/00 is the correct
@ -356,9 +355,13 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
* drive doesn't have that capability.
* cdrom_log_sense() knows this!
*/
} else if (!quiet) {
/* otherwise, print an error */
ide_dump_status(drive, "packet command error", stat);
if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
break;
/* fall-through */
default:
if (!quiet)
ide_dump_status(drive, "packet command error",
stat);
}
rq->cmd_flags |= REQ_FAILED;
@ -378,12 +381,11 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
if (blk_noretry_request(rq))
do_end_request = 1;
if (sense_key == NOT_READY) {
/* tray open */
switch (sense_key) {
case NOT_READY:
if (rq_data_dir(rq) == READ) {
cdrom_saw_media_change(drive);
/* fail the request */
if (!quiet)
printk(KERN_ERR PFX "%s: tray open\n",
drive->name);
@ -392,8 +394,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
return 1;
}
do_end_request = 1;
} else if (sense_key == UNIT_ATTENTION) {
/* media change */
break;
case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
/*
@ -402,8 +404,9 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
*/
if (++rq->errors > ERROR_MAX)
do_end_request = 1;
} else if (sense_key == ILLEGAL_REQUEST ||
sense_key == DATA_PROTECT) {
break;
case ILLEGAL_REQUEST:
case DATA_PROTECT:
/*
* No point in retrying after an illegal request or data
* protect error.
@ -411,7 +414,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
if (!quiet)
ide_dump_status(drive, "command error", stat);
do_end_request = 1;
} else if (sense_key == MEDIUM_ERROR) {
break;
case MEDIUM_ERROR:
/*
* No point in re-trying a zillion times on a bad
* sector. If we got here the error is not correctable.
@ -420,19 +424,22 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
ide_dump_status(drive, "media error "
"(bad sector)", stat);
do_end_request = 1;
} else if (sense_key == BLANK_CHECK) {
break;
case BLANK_CHECK:
/* disk appears blank ?? */
if (!quiet)
ide_dump_status(drive, "media error (blank)",
stat);
do_end_request = 1;
} else if ((err & ~ATA_ABORTED) != 0) {
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
} else if ((++rq->errors > ERROR_MAX)) {
/* we've racked up too many retries, abort */
do_end_request = 1;
break;
default:
if (err & ~ATA_ABORTED) {
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
} else if (++rq->errors > ERROR_MAX)
/* we've racked up too many retries, abort */
do_end_request = 1;
}
/*