On Fri, Jan 05, 2007 at 09:52:33AM +0100, Jean Delvare wrote:
> Hi Adrian,
>
> On Tue, 19 Dec 2006 05:13:15 +0100, Adrian Bunk wrote:
> > This patch contains the following cleanups:
> > - move all EXPORT_SYMBOL's directly below the code they are exporting
> > - move all DECLARE_PCI_FIXUP_*'s directly below the functions they
> > are calling
>
> Thanks for doing this cleanup, it was really needed. I think you didn't
> get everything right though:
>...
> > @@ -1122,6 +1123,14 @@ static void quirk_sis_96x_smbus(struct p
> > pci_write_config_byte(dev, 0x77, val & ~0x10);
> > pci_read_config_byte(dev, 0x77, &val);
> > }
> > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_961, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_962, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_963, quirk_sis_96x_smbus );
> > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC, quirk_sis_96x_smbus );
> >
> > /*
> > * ... This is further complicated by the fact that some SiS96x south
> > @@ -1158,6 +1167,8 @@ static void quirk_sis_503(struct pci_dev
> > */
> > dev->device = devid;
> > }
> > +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503 );
> > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, quirk_sis_503 );
>
> Was this patch tested on the SiS-based boards which need these quirks?
> I think you broke them. If I remember correctly, quirk_sis_503() must
> be called before quirk_sis_96x_smbus() for some boards to work
> properly, and we currently rely on the linking order to guarantee that.
> Likewise, quirk_sis_96x_compatible() should be called before
> quirk_sis_503() otherwise the warning message in quirk_sis_503() will
> no longer be correct.
>
> So if you want to put the calls right after the quirk functions, you
> need to reorder the functions themselves as well. Feel free to add a
> comment explaining the order requirement so that nobody breaks it
> accidentally again in the future.
>...
Thanks for this information.
While looking at the code, I also noted the following:
quirk_sis_96x_compatible() is pretty useless since all it does is to set
a static variable that is only used in a printk().
quirk_sis_96x_compatible() was added with:
2003/05/13 13:48:50-07:00 mhoffman
[PATCH] i2c: Add SiS96x I2C/SMBus driver
This patch adds support for the SMBus of SiS96x south
bridges. It is based on i2c-sis645.c from the lm sensors
project, which never made it into an official kernel and
was anyway mis-named.
This driver works on my SiS 645/961 board vs w83781d.
It's usage in
static void __init quirk_sis_503_smbus(struct pci_dev *dev)
{
if (sis_96x_compatible)
quirk_sis_96x_smbus(dev);
}
Was removed in
Author: torvalds <torvalds>
Date: Thu Oct 30 19:03:38 2003 +0000
Stop SIS 96x chips from lying about themselves.
Some machines with the SIS 96x southbridge have it set up
to claim it is a SIS 503 chip. That breaks irq routing logic
among other things. Fix it properly by making everybody aware
of the duplicity.
Was this intentional (and quirk_sis_96x_compatible() should be removed),
or is this a bug that should be fixed?
> Thanks,
> Jean Delvare
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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