This is based on the proposed patches flying around but also checks that
the device in question is new enough to have word 93 rather thanb
blindly assuming word 93 == 0 means SATA (see ATA-5, ATA-7)
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.17/drivers/ide/ide-iops.c linux-2.6.17/drivers/ide/ide-iops.c
--- linux.vanilla-2.6.17/drivers/ide/ide-iops.c 2006-06-19 17:17:24.000000000 +0100
+++ linux-2.6.17/drivers/ide/ide-iops.c 2006-06-26 14:04:52.101408544 +0100
@@ -597,6 +597,10 @@
{
if(HWIF(drive)->udma_four == 0)
return 0;
+
+ /* Check for SATA but only if we are ATA5 or higher */
+ if (drive->id->hw_config == 0 && (drive->id->major_rev_num & 0x7FE0))
+ return 1;
if (!(drive->id->hw_config & 0x6000))
return 0;
#ifndef CONFIG_IDEDMA_IVB
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