On Thu, 10 Feb 2005 15:05:37 -0500
"Simon White" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I've been writing a device driver for a piece of hardware that we recently
> found the pci bridge has an issue on software reset (kernel 2.6.8.1, hardware
> reset is fine). The bridge appears to corrupt the subvendor/device ids on
> next boot. We have found a software work around in that I can write to the
> bridge on module exit and it will always detect correctly next boot (through
> module_exit when rmmod'd).
>
> However on shutting down a machine with the module loaded it never works next
> time, so is module_exit actually called?
(Line wrap your mail please)
> Secondly I searched through some code and on google to determine if I could
> detect a shutdown notification in the kernel. I thougt I'd found something
> using:
>
> static struct pci_driver hsid_driver =
> {
> .name = HSID_NAME,
> .id_table = id_table,
> .probe = hsid_probe,
> .driver =
> {
> .shutdown = hsid_shutdown,
> },
> };
>
> However that also appears not to work. I wondered what the correct solution
> was for detecting system shutdown in the kernel even if the application using
> the device has locked up on un-interruptible sleep, so I may try to clean the
> hardware up a little.
>
> Thankyou for any assistance,
> Simon
How about the following, you probably still need pci_hook to handle PCI hot
plug,
but you hardware probably doesn't do bus hot plug anyway.
------------
static int hsid_notify(struct notifier_block *this, unsigned long code, void
*unused)
{
if (code==SYS_DOWN || code==SYS_HALT) {
bang_the_bridge();
}
return NOTIFY_DONE;
}
static struct notifier_block hsid_notifier = {
.notifier_call = hsid_notify,
};
hsid_module_init()
...
register_reboot_notifier(&hsid_notifier);
hsid_module_exit()
...
unregister_reboot_notifier(&hsid_notifier);
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