From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bartlomiej Zolnierkiewicz Subject: [PATCH 22/40] ide-floppy: start DMA engine in idefloppy_transfer_pc1() Date: Sun, 18 May 2008 20:57:45 +0200 Message-ID: <20080518185745.5636.55162.sendpatchset@localhost.localdomain> References: <20080518185428.5636.77234.sendpatchset@localhost.localdomain> Return-path: Received: from fk-out-0910.google.com ([209.85.128.190]:17236 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756459AbYERSkV (ORCPT ); Sun, 18 May 2008 14:40:21 -0400 Received: by fk-out-0910.google.com with SMTP id 18so1473278fkq.5 for ; Sun, 18 May 2008 11:40:20 -0700 (PDT) In-Reply-To: <20080518185428.5636.77234.sendpatchset@localhost.localdomain> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Cc: Borislav Petkov , Bartlomiej Zolnierkiewicz , linux-kernel@vger.kernel.org Start DMA engine and set PC_FLAG_DMA_IN_PROGRESS flag in idefloppy_transfer_pc1() instead of idefloppy_issue_pc() so the Status Register and the Interrupt Reason Register are checked first. Cc: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-floppy.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) Index: b/drivers/ide/ide-floppy.c =================================================================== --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -534,6 +534,7 @@ static ide_startstop_t idefloppy_transfe { ide_hwif_t *hwif = drive->hwif; idefloppy_floppy_t *floppy = drive->driver_data; + struct ide_atapi_pc *pc = floppy->pc; ide_expiry_t *expiry; unsigned int timeout; ide_startstop_t startstop; @@ -568,6 +569,12 @@ static ide_startstop_t idefloppy_transfe ide_set_handler(drive, &idefloppy_pc_intr, timeout, expiry); + /* Begin DMA, if necessary */ + if (pc->flags & PC_FLAG_DMA_OK) { + pc->flags |= PC_FLAG_DMA_IN_PROGRESS; + hwif->dma_ops->dma_start(drive); + } + if ((floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) == 0) /* Send the actual packet */ hwif->output_data(drive, NULL, floppy->pc->c, 12); @@ -633,13 +640,10 @@ static ide_startstop_t idefloppy_issue_p if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) dma = !hwif->dma_ops->dma_setup(drive); - ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma); + if (!dma) + pc->flags &= ~PC_FLAG_DMA_OK; - if (dma) { - /* Begin DMA, if necessary */ - pc->flags |= PC_FLAG_DMA_IN_PROGRESS; - hwif->dma_ops->dma_start(drive); - } + ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma); if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) { /* Issue the packet command */