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SubjectRe: AMD 760MPX DMA lockup (partly solved)
Alan Cox wrote:
: On Thu, 2002-09-12 at 20:14, Jan Kasprzak wrote:
: > I the bug got merged from the -ac kernels, because it is
: > present bot in the kernel 2.4.19-11 from RedHat "null" beta
: > and in 2.4.20-pre2-ac1 (altough the later crashes instead of lock-up).
:
: That would strange actually. The Red Hat beta kernel has 2.4.18 like IDE
: not -ac like IDE
:
Well, it is probably not IDE-related at all, but rather it has
something to do with PCI or may be scheduling changes that -pre2-ac2 does.
Currently I positively know that 2.4.20-pre2 works, but 2.4.20-ac2 and
2.4.20-pre5 does not. I have tested 2.4.20-pre2-ac1 and 2.4.20-pre[34],
but all these does not work for me probably for some other reason.

So I have taken patch-2.4.20-pre2-ac2, and deleted all
changes except the ones that are IDE-related, and 2.4.20-pre2 plus the
following parts of -pre2-ac2 works:

drivers/ide/Config.in | 15
drivers/ide/Makefile | 9
drivers/ide/amd74xx.c | 292 +++---
drivers/ide/hd.c | 42
drivers/ide/ide-disk.c | 879 +++++++++++-------
drivers/ide/ide-dma.c | 347 +++----
drivers/ide/ide-features.c | 385 --------
drivers/ide/ide-pci.c | 539 +++++------
drivers/ide/ide-probe.c | 126 +-
drivers/ide/ide-proc.c | 58 -
drivers/ide/ide-taskfile.c | 2159 +++++++++++++++++++++++++++++++++------------ drivers/ide/ide.c | 651 +++----------
drivers/ide/pdc202xx.c | 1098 +++++++++++++---------
drivers/ide/pdc4030.c | 272 ++++-
drivers/ide/pdcadma.c | 106 ++
include/asm-i386/ide.h | 26
include/asm-i386/system.h | 14
include/linux/hdreg.h | 93 +
include/linux/ide.h | 409 +++++---
include/linux/pci_ids.h | 16
20 files changed, 4524 insertions, 3012 deletions

I have to delete the first chunk of the patch of
include/asm-i386/ide.h, and I have deleted the call to
pci_enable_device_bars() in drivers/ide/ide-pci.c to be able to compile
this, but other than that it is exactly the same as 2.4.20-pre2-ac2 IDE code.
I will send you this as a patch against 2.4.20-pre2 if you want.

This still works, so it means the problem has to be in some other
part of 2.4.20-pre2-ac2.

Vojtech Pavlik wrote:
:
: X33? X33 doesn't make sense.
:
X34, sorry. DMA 33.

-Y.

--
| Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839 Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/ Czech Linux Homepage: http://www.linux.cz/ |
|----------- If you want the holes in your knowledge showing up -----------|
|----------- try teaching someone. -- Alan Cox -----------|
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