In some situations we find that SATA devices are attached via PATA/SATA
bridges. When we find this we need to change a couple of bits of behaviour
- Error changedown behaviour for SATA is different - no point
dropping to PIO
- 40/80 wire cable detection testing cannot be done.
Thus we need to detect this case and update the cable type accordingly.
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.22-rc1-mm1/drivers/ata/libata-core.c linux-2.6.22-rc1-mm1/drivers/ata/libata-core.c
--- linux.vanilla-2.6.22-rc1-mm1/drivers/ata/libata-core.c 2007-05-18 16:22:53.000000000 +0100
+++ linux-2.6.22-rc1-mm1/drivers/ata/libata-core.c 2007-05-18 16:40:23.000000000 +0100
@@ -2186,6 +2186,16 @@
if (ap->ops->cable_detect)
ap->cbl = ap->ops->cable_detect(ap);
+ /* We may have SATA bridge glue hiding here irrespective of the
+ reported cable types and sensed types */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ dev = &ap->device[i];
+ if (!ata_dev_enabled(dev))
+ continue;
+ if (ata_id_is_sata(dev->id))
+ ap->cbl = ATA_CBL_SATA;
+ }
+
/* After the identify sequence we can now set up the devices. We do
this in the normal order so that the user doesn't get confused */
-
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