From 0bc2a79a2002e3cc1b514c100b6c576983da6a90 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 31 Jul 2007 14:01:48 +0100
Subject: libata: Correct IORDY handling
Debugging a report of a problem with an ancient solid state disk showed
up some problems in the IORDY handling
1. We check the wrong bit to see if the device has IORDY
2. Even then some ancient creaking piles of crap don't support
SETXFER at all.
The cases it fixes are obscure and the risk of side effects is slight
but possible. This also moves us slightly closer to supporting original
MFM/RLL disks with libata.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
include/linux/ata.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'include')
diff --git a/include/linux/ata.h b/include/linux/ata.h
index c043c1ccf1..40c7af05fd 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -358,7 +358,7 @@ struct ata_taskfile {
#define ata_id_removeable(id) ((id)[0] & (1 << 7))
#define ata_id_has_dword_io(id) ((id)[50] & (1 << 0))
#define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
-#define ata_id_has_iordy(id) ((id)[49] & (1 << 9))
+#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
#define ata_id_u32(id,n) \
(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
#define ata_id_u64(id,n) \
--
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