From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] 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.
Cc: Borislav Petkov <petkovbb@xxxxxxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-cd.c | 57 ++++++++++++++++++++++++++++-----------------------
1 file changed, 32 insertions(+), 25 deletions(-)
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -339,15 +339,14 @@ static int cdrom_decode_status(ide_drive
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
@@ -355,9 +354,13 @@ static int cdrom_decode_status(ide_drive
* drive doesn't have that capability.
* cdrom_log_sense() knows this!
*/
- } else if (!(rq->cmd_flags & REQ_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 ((rq->cmd_flags & REQ_QUIET) == 0)
+ ide_dump_status(drive, "packet command error",
+ stat);
}
rq->cmd_flags |= REQ_FAILED;
@@ -377,12 +380,11 @@ static int cdrom_decode_status(ide_drive
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 ((rq->cmd_flags & REQ_QUIET) == 0)
printk(KERN_ERR PFX "%s: tray open\n",
drive->name);
@@ -391,8 +393,8 @@ static int cdrom_decode_status(ide_drive
return 1;
}
do_end_request = 1;
- } else if (sense_key == UNIT_ATTENTION) {
- /* media change */
+ break;
+ case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
/*
@@ -401,8 +403,9 @@ static int cdrom_decode_status(ide_drive
*/
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.
@@ -410,7 +413,8 @@ static int cdrom_decode_status(ide_drive
if ((rq->cmd_flags & REQ_QUIET) == 0)
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.
@@ -419,19 +423,22 @@ static int cdrom_decode_status(ide_drive
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 ((rq->cmd_flags & REQ_QUIET) == 0)
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;
}
/*
--
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