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[PATCH] ide: fix ide_toggle_bounce() to not try to bounce if we have an IOMMU 

The following patch fixes a crash caused by attempting to bounce buffer
when an IDE CD-ROM is used on a machine with an IO-MMU. [At least, this
patch fixes things so I can use my IDE CD-ROM behind an ns87415 on a 
HP PA-RISC workstation.]

Signed-off-by: James Bottomley <jejb@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
James Bottomley 2005-11-18 23:13:33 +01:00 committed by Bartlomiej Zolnierkiewicz
parent c37ea218cb
commit 6593178dd4
1 changed files with 4 additions and 4 deletions
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8
drivers/ide/ide-lib.c
View File

@ -410,10 +410,10 @@ void ide_toggle_bounce(ide_drive_t *drive, int on)
{
u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
if (on && drive->media == ide_disk) {
if (!PCI_DMA_BUS_IS_PHYS)
addr = BLK_BOUNCE_ANY;
else if (HWIF(drive)->pci_dev)
if (!PCI_DMA_BUS_IS_PHYS) {
addr = BLK_BOUNCE_ANY;
} else if (on && drive->media == ide_disk) {
if (HWIF(drive)->pci_dev)
addr = HWIF(drive)->pci_dev->dma_mask;
}