For the compatibility mode check, the ATA driver uses the bits in the
"Revision" byte instead of the "Programming Interface Byte" of the class
value (See T13/1510D). The compat_use[] flags are never set.
This patch fixes both issues.
Christian
2009-01-11 Christian Franke <fra...@computer.org>
* disk/ata.c (grub_ata_pciinit): Fix bit numbers of compatibility
mode check. Fix setting of compat_use[].
diff --git a/disk/ata.c b/disk/ata.c
index 6e0b8b8..4ca63c2 100644
--- a/disk/ata.c
+++ b/disk/ata.c
@@ -504,7 +504,7 @@ grub_ata_pciinit (int bus, int device, int func,
for (i = 0; i < 2; i++)
{
/* Set to 0 when the channel operated in compatibility mode. */
- int compat = (class >> (2 * i)) & 1;
+ int compat = (class >> (8 + 2 * i)) & 1;
rega = 0;
regb = 0;
@@ -515,7 +515,7 @@ grub_ata_pciinit (int bus, int device, int func,
{
rega = grub_ata_ioaddress[i];
regb = grub_ata_ioaddress2[i];
- compat_use[i] = 0;
+ compat_use[i] = 1;
}
else if (compat)
{
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