From 6593178dd46d64a5bcb0402a4f3acd95b0687abd Mon Sep 17 00:00:00 2001
From: James Bottomley <jejb@parisc-linux.org>
Date: Fri, 18 Nov 2005 23:13:33 +0100
Subject: [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>

diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index b09a653..41d46db 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -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;
 	}
 
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