From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: [PATCH 11/63] ide-cd: add ide_cd_pad_transfer() helper Date: Thu, 20 Dec 2007 02:00:38 +0100 Message-ID: <200712200200.38615.bzolnier@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from ug-out-1314.google.com ([66.249.92.170]:12451 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757001AbXLTBeM (ORCPT ); Wed, 19 Dec 2007 20:34:12 -0500 Received: by ug-out-1314.google.com with SMTP id z38so389252ugc.16 for ; Wed, 19 Dec 2007 17:34:11 -0800 (PST) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Cc: linux-kernel@vger.kernel.org Add ide_cd_pad_transfer() helper and use it in cdrom_[new]pc_intr() and cdrom_{read,write}_check_ireason(). There should be no functionality changes caused by this patch. Signed-off-by: Bartlomiej Zolnierkiewicz --- -39 bytes drivers/ide/ide-cd.c | 51 +++++++++++++++++++++++++-------------------------- 1 file changed, 25 insertions(+), 26 deletions(-) Index: b/drivers/ide/ide-cd.c =================================================================== --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -1007,6 +1007,15 @@ static ide_startstop_t cdrom_transfer_pa typedef void (xfer_func_t)(ide_drive_t *, void *, u32); +static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len) +{ + while (len > 0) { + int dum = 0; + xf(drive, &dum, sizeof(dum)); + len -= sizeof(dum); + } +} + /* * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector * buffer. Once the first sector is added, any subsequent sectors are @@ -1063,17 +1072,15 @@ int cdrom_read_check_ireason (ide_drive_ if (ireason == 2) return 0; else if (ireason == 0) { + ide_hwif_t *hwif = drive->hwif; + /* Whoops... The drive is expecting to receive data from us! */ printk(KERN_ERR "%s: %s: wrong transfer direction!\n", drive->name, __FUNCTION__); /* Throw some data at the drive so it doesn't hang and quit this request. */ - while (len > 0) { - int dum = 0; - HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof (dum)); - len -= sizeof (dum); - } + ide_cd_pad_transfer(drive, hwif->atapi_output_bytes, len); } else if (ireason == 1) { /* Some drives (ASUS) seem to tell us that status * info is available. just get it and ignore. @@ -1500,15 +1507,8 @@ static ide_startstop_t cdrom_pc_intr (id /* Transfer the data. */ xferfunc(drive, rq->data, thislen); - /* If we haven't moved enough data to satisfy the drive, - add some padding. */ - while (len > thislen) { - int dum = 0; - xferfunc(drive, &dum, sizeof(dum)); - len -= sizeof(dum); - } - /* Keep count of how much data we've moved. */ + len -= thislen; rq->data += thislen; rq->data_len -= thislen; @@ -1525,6 +1525,13 @@ confused: return ide_stopped; } + /* + * If we haven't moved enough data to satisfy the drive, + * add some padding. + */ + if (len > 0) + ide_cd_pad_transfer(drive, xferfunc, len); + /* Now we wait for another interrupt. */ ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry); return ide_started; @@ -1617,15 +1624,13 @@ static int cdrom_write_check_ireason(ide if (ireason == 0) return 0; else if (ireason == 2) { + ide_hwif_t *hwif = drive->hwif; + /* Whoops... The drive wants to send data. */ printk(KERN_ERR "%s: %s: wrong transfer direction!\n", drive->name, __FUNCTION__); - while (len > 0) { - int dum = 0; - HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum)); - len -= sizeof(dum); - } + ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len); } else { /* Drive wants a command packet, or invalid ireason... */ printk(KERN_ERR "%s: %s: bad interrupt reason 0x02%x\n", @@ -1754,14 +1759,8 @@ static ide_startstop_t cdrom_newpc_intr( /* * pad, if necessary */ - if (len > 0) { - while (len > 0) { - int pad = 0; - - xferfunc(drive, &pad, sizeof(pad)); - len -= sizeof(pad); - } - } + if (len > 0) + ide_cd_pad_transfer(drive, xferfunc, len); BUG_ON(HWGROUP(drive)->handler != NULL);