openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-07-15 21:21:56 +02:00
parent 5e33109582
commit 6ffb66410d
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/ide/ide-floppy.c
View File

@ -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 */