From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH 3/5] ide-cd: convert cdrom_decode_status() to use switch statements Date: Sun, 5 Apr 2009 08:09:11 +0200 Message-ID: <20090405060911.GC4189@liondog.tnic> References: <20090403195757.31438.16866.sendpatchset@localhost.localdomain> <20090403195810.31438.66965.sendpatchset@localhost.localdomain> Reply-To: petkovbb@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Received: from mail-fx0-f158.google.com ([209.85.220.158]:50459 "EHLO mail-fx0-f158.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754789AbZDEGJS (ORCPT ); Sun, 5 Apr 2009 02:09:18 -0400 Content-Disposition: inline In-Reply-To: <20090403195810.31438.66965.sendpatchset@localhost.localdomain> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Bartlomiej Zolnierkiewicz Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On Fri, Apr 03, 2009 at 09:58:10PM +0200, Bartlomiej Zolnierkiewicz wrote: > From: Bartlomiej Zolnierkiewicz > Subject: [PATCH] ide-cd: convert cdrom_decode_status() to use switch statements Here's a rediffed version: --- From: Borislav Petkov 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 Signed-off-by: Bartlomiej Zolnierkiewicz --- 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.