PATCH: ide should check dma_on

[Alan Cox]

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux-2.5.65/drivers/ide/ide.c linux-2.5.65-ac2/drivers/ide/ide.c
--- linux-2.5.65/drivers/ide/ide.c	2003-03-03 19:20:09.000000000 +0000
+++ linux-2.5.65-ac2/drivers/ide/ide.c	2003-03-20 18:23:19.000000000 +0000
@@ -1255,13 +1284,14 @@
 
 static int set_using_dma (ide_drive_t *drive, int arg)
 {
-	if (!drive->driver || !DRIVER(drive)->supports_dma)
+	if (!DRIVER(drive)->supports_dma)
 		return -EPERM;
 	if (!drive->id || !(drive->id->capability & 1))
 		return -EPERM;
 	if (HWIF(drive)->ide_dma_check == NULL)
 		return -EPERM;
 	if (arg) {
+		if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
 		if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
 	} else {
 		if (HWIF(drive)->ide_dma_off(drive)) return -EIO;