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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-07-15 21:21:56 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-07-15 21:21:56 +0200
commit6ffb66410dd9f5f383d9265d51ab667333a8296c (patch)
tree8974bd5ed612fde885e26b42ca738f3dbfce3047 /drivers
parent5e3310958204912f3f00be2592c945fbc37db6ae (diff)
ide-floppy: start DMA engine in idefloppy_transfer_pc1()
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 <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/ide-floppy.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index dbefe35c1396..1df6a3143596 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -534,6 +534,7 @@ static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
{
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_transfer_pc1(ide_drive_t *drive)
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_pc(ide_drive_t *drive,
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 */