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Message-ID: <20090405064631.GB774@liondog.tnic>
Date: Sun, 5 Apr 2009 08:46:31 +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 4/5] ide-cd: unify handling of fs and pc requests in
cdrom_decode_status()
On Fri, Apr 03, 2009 at 09:58:17PM +0200, Bartlomiej Zolnierkiewicz wrote:
> From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> Subject: [PATCH] ide-cd: unify handling of fs and pc requests in cdrom_decode_status()
Rediffed:
---
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Date: Fri, 3 Apr 2009 21:58:17 +0200
Subject: [PATCH] ide-cd: unify handling of fs and pc requests in cdrom_decode_status()
Unify handling of fs and pc requests in cdrom_decode_status().
While at it:
- remove unreachable code
The only change in functionality is that for pc requests more
detailed error message will be printed for following sense keys:
* ILLEGAL_REQUEST
* DATA_PROTECT
* MEDIUM_ERROR
* BLANK_CHECK
Signed-off-by: Borislav Petkov <petkovbb@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-cd.c | 69 +++++++++++++++++--------------------------------
1 files changed, 24 insertions(+), 45 deletions(-)
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 43db330..ffbaa6d 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -330,8 +330,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
*/
rq->cmd_flags |= REQ_FAILED;
return 2;
- } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
- /* All other functions, except for READ. */
+ } else {
+ int do_end_request = 0;
/*
* if we have an error, pass back CHECK_CONDITION as the
@@ -340,53 +340,16 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
if (blk_pc_request(rq) && !rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
- switch (sense_key) {
- case NOT_READY:
- cdrom_saw_media_change(drive);
- break;
- case UNIT_ATTENTION:
- cdrom_saw_media_change(drive);
- return 0;
- case ILLEGAL_REQUEST:
- /*
- * Don't print error message for this condition--
- * SFF8090i indicates that 5/24/00 is the correct
- * response to a request to close the tray if the
- * drive doesn't have that capability.
- * cdrom_log_sense() knows this!
- */
- 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;
-
- /*
- * instead of playing games with moving completions around,
- * remove failed request completely and end it when the
- * request sense has completed
- */
- goto end_request;
-
- } else if (blk_fs_request(rq)) {
- int do_end_request = 0;
-
- /* handle errors from READ and WRITE requests */
-
if (blk_noretry_request(rq))
do_end_request = 1;
switch (sense_key) {
case NOT_READY:
- if (rq_data_dir(rq) == READ) {
+ if (blk_fs_request(rq) == 0 ||
+ rq_data_dir(rq) == READ) {
cdrom_saw_media_change(drive);
- if (!quiet)
+ if (blk_fs_request(rq) && !quiet)
printk(KERN_ERR PFX "%s: tray open\n",
drive->name);
} else {
@@ -398,6 +361,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
+ if (blk_fs_request(rq) == 0)
+ return 0;
/*
* Arrange to retry the request but be sure to give up
* if we've retried too many times.
@@ -406,6 +371,16 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
do_end_request = 1;
break;
case ILLEGAL_REQUEST:
+ /*
+ * Don't print error message for this condition--
+ * SFF8090i indicates that 5/24/00 is the correct
+ * response to a request to close the tray if the
+ * drive doesn't have that capability.
+ * cdrom_log_sense() knows this!
+ */
+ if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
+ break;
+ /* fall-through */
case DATA_PROTECT:
/*
* No point in retrying after an illegal request or data
@@ -433,6 +408,8 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
do_end_request = 1;
break;
default:
+ if (blk_fs_request(rq) == 0)
+ break;
if (err & ~ATA_ABORTED) {
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
@@ -442,6 +419,11 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
do_end_request = 1;
}
+ if (blk_fs_request(rq) == 0) {
+ rq->cmd_flags |= REQ_FAILED;
+ do_end_request = 1;
+ }
+
/*
* End a request through request sense analysis when we have
* sense data. We need this in order to perform end of media
@@ -457,9 +439,6 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
if (stat & ATA_ERR)
cdrom_queue_request_sense(drive, NULL, NULL);
return 1;
- } else {
- blk_dump_rq_flags(rq, PFX "bad rq");
- return 2;
}
end_request:
--
1.6.2.1
--
Regards/Gruss,
Boris.
--
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