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| author | Mikael Pettersson <mikpe@it.uu.se> | 2007-03-03 19:57:44 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-03-06 09:04:30 (GMT) |
| commit | 8b966dddc29899008fb178a533263afa8d1ad849 (patch) | |
| tree | 7218755b2b5dd34606b9a1b0d27e1e3bbfa57134 /Documentation/kbuild | |
| parent | 8af12cdb7c4aa9ed278ed71a8b5b130f2d8c8920 (diff) | |
| download | linux-fsl-qoriq-8b966dddc29899008fb178a533263afa8d1ad849.tar.xz | |
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 'Documentation/kbuild')
0 files changed, 0 insertions, 0 deletions