Re: Regression with commit f9cde5f in 2.6.30-gitX

Ingo Molnar
2009-06-24T15:16:57Z

* Larry Finger <Larry.Finger@lwfinger.net> wrote:

> Jaswinder Singh Rajput wrote:
> > On Tue, 2009-06-23 at 20:33 -0500, Larry Finger wrote:
> >> My latest pull from Linus's tree fails to boot. Bisection leads to the
> >> commit entitled "x86/ACPI: Correct maximum allowed _CRS returned
> >> resources and warn if exceeded" with hash
> >> f9cde5ffed17bf74f6bef042d99edb0622f58576. I have been unable to
> >> capture the first error message as it scrolls off the screen, but the
> >> second hits the WARN_ON at drivers/ata/ahci.c:695 in routine
> >> ahci_enable_ahci() because HOST_AHCI_EN is not set.
> >>
> >
> > This patch fixes boot failure on my AMD 64 laptop, can you please test
> > this patch:
> >
> > [PATCH] x86: fix _CRS resources return handling
> >
> > We need to check for info->res_num and only handle for < PCI_BUS_NUM_RESOURCES
> >
> > Also set info->bus->resource[info->res_num] for _CRS resources return handling
> >
> > Fixed boot failure on some machine.
> >
> > Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
> > Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
> > ---
> > arch/x86/pci/acpi.c | 16 ++++++++++------
> > 1 files changed, 10 insertions(+), 6 deletions(-)
>
> Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
>
> Thanks for the patch. With it, my machine boots with the latest
> 2.6.30-gitX.

Please note the comments from Yinghai and Thomas. The fix does
something weird after injecting unrelated cleanups and the changelog
does not cover that.

Ingo