Re: Buggy PCI drivers - do not mark pci_device_id as discardable data

[Russell King <rmk@arm.linux.org.uk>]

On Tue, Sep 09, 2003 at 04:02:58PM -0400, Zwane Mwaikambo wrote:
> On Tue, 9 Sep 2003, Russell King wrote:
> 
> > --- orig/drivers/char/watchdog/amd7xx_tco.c	Sat Jun 14 22:33:48 2003
> > +++ linux/drivers/char/watchdog/amd7xx_tco.c	Tue Sep  9 20:45:16 2003
> > @@ -294,7 +294,7 @@
> >  	.fops	= &amdtco_fops
> >  };
> >  
> > -static struct pci_device_id amdtco_pci_tbl[] __initdata = {
> > +static struct pci_device_id amdtco_pci_tbl[] = {
> >  	/* AMD 766 PCI_IDs here */
> >  	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_OPUS_7443, PCI_ANY_ID, PCI_ANY_ID, },
> >  	{ 0, }
> 
> That's not a bug.
> 
> > --- orig/drivers/char/watchdog/i810-tco.c	Sun Aug  3 11:21:11 2003
> > +++ linux/drivers/char/watchdog/i810-tco.c	Tue Sep  9 20:45:16 2003
> > @@ -301,7 +301,7 @@
> >   * register a pci_driver, because someone else might one day
> >   * want to register another driver on the same PCI id.
> >   */
> > -static struct pci_device_id i810tco_pci_tbl[] __initdata = {
> > +static struct pci_device_id i810tco_pci_tbl[] = {
> >  	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0,	PCI_ANY_ID, PCI_ANY_ID, },
> >  	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0,	PCI_ANY_ID, PCI_ANY_ID, },
> >  	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0,	PCI_ANY_ID, PCI_ANY_ID, },
> 
> Neither is that.
> 
> > --- orig/drivers/char/hw_random.c	Sat Jun 14 22:33:46 2003
> > +++ linux/drivers/char/hw_random.c	Tue Sep  9 20:45:16 2003
> > @@ -149,7 +149,7 @@
> >   * register a pci_driver, because someone else might one day
> >   * want to register another driver on the same PCI id.
> >   */
> > -static struct pci_device_id rng_pci_tbl[] __initdata = {
> > +static struct pci_device_id rng_pci_tbl[] = {
> >  	{ 0x1022, 0x7443, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_amd },
> >  	{ 0x1022, 0x746b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, rng_hw_amd },
> 
> This too

They're all bugs, plain and simple.  The pci device id tables are scanned
*whenever* a new pci device is inserted into the system, or the appropriate
numbers are echoed to the "new_id" driver model entry for the driver.

It doesn't matter if the driver doesn't care or not.

-- 
Russell King (rmk@arm.linux.org.uk)	http://www.arm.linux.org.uk/personal/
Linux kernel maintainer of:
  2.6 ARM Linux   - http://www.arm.linux.org.uk/
  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
  2.6 Serial core