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Subject[PATCH 22/40] 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>
---
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 */

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