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authorMikael Pettersson <mikpe@it.uu.se>2007-03-03 20:57:44 +0100
committerJeff Garzik <jeff@garzik.org>2007-03-06 04:04:30 -0500
commit8b966dddc29899008fb178a533263afa8d1ad849 (patch)
tree7218755b2b5dd34606b9a1b0d27e1e3bbfa57134 /drivers/ata/pata_legacy.c
parent8af12cdb7c4aa9ed278ed71a8b5b130f2d8c8920 (diff)
downloadblackbird-op-linux-8b966dddc29899008fb178a533263afa8d1ad849.tar.gz
blackbird-op-linux-8b966dddc29899008fb178a533263afa8d1ad849.zip
pata_legacy: fix io/irq mismatch
pata_legacy fails to detect the disk on my old ISA/VLB 486: it starts to probe io=0x1f0 ctr=0x3f6 irq=15, complains loudly about IDENTIFYs timing out, and finally fails. (Sorry I couldn't capture the kernel's boot messages.) It turns out that the driver's mapping from io to irq in legacy_irq[] is wrong: index 0 for io=0x1f0 has irq=15 but should have irq=14, and index 1 for io=0x170 has irq=14 but should have irq=15. This is confirmed by a comparison with include/asm-i386/ide.h:ide_default_irq(). This patch swaps the first two elements in legacy_irq[], which makes pata_legacy work on my 486. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_legacy.c')
-rw-r--r--drivers/ata/pata_legacy.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index fc5b73d78e00..86fbcd6a742b 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -69,7 +69,7 @@
#define NR_HOST 6
static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
-static int legacy_irq[NR_HOST] = { 15, 14, 11, 10, 8, 12 };
+static int legacy_irq[NR_HOST] = { 14, 15, 11, 10, 8, 12 };
struct legacy_data {
unsigned long timing;
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