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Message-ID: <20090405060911.GC4189@liondog.tnic>
Date: Sun, 5 Apr 2009 08:09:11 +0200
From: Borislav Petkov <petkovbb@...glemail.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc: linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] ide-cd: convert cdrom_decode_status() to use
switch statements
On Fri, Apr 03, 2009 at 09:58:10PM +0200, Bartlomiej Zolnierkiewicz wrote:
> From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> Subject: [PATCH] ide-cd: convert cdrom_decode_status() to use switch statements
Here's a rediffed version:
---
From: Borislav Petkov <petkovbb@...il.com>
Date: Sun, 5 Apr 2009 08:07:17 +0200
Subject: [PATCH] ide-cd: convert cdrom_decode_status() to use switch statements
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: Borislav Petkov <petkovbb@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-cd.c | 57 ++++++++++++++++++++++++++++----------------------
1 files changed, 32 insertions(+), 25 deletions(-)
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index d95a2f0..df01b91 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -304,15 +304,14 @@ 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
@@ -320,9 +319,13 @@ 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;
@@ -342,12 +345,11 @@ 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);
@@ -381,8 +383,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
return 1;
}
}
- } else if (sense_key == UNIT_ATTENTION) {
- /* media change */
+ break;
+ case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
/*
@@ -391,8 +393,9 @@ 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.
@@ -400,7 +403,8 @@ 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.
@@ -409,19 +413,22 @@ 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;
}
/*
--
1.6.2.1
--
Regards/Gruss,
Boris.
--
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