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    SubjectRe: [PATCH] pci_get_device call from interrupt in reboot fixups
    Greg KH wrote:
    > On Tue, Aug 07, 2007 at 12:44:55AM -0700, Andrew Morton wrote:
    >> On Tue, 7 Aug 2007 00:24:37 -0700 Andrew Morton <> wrote:
    >>>> Andrew, I really don't want to change the PCI core to handle this, as we
    >>>> finally fixed a lot of issues with drivers trying to walk these lists
    >>>> from interrupt context. So if you want to just hide the warning message
    >>>> as we are shutting down, that's fine with me. Or just don't do the
    >>>> fixups. But grabbing a reference to the pci device is unsafe in my
    >>>> opinion and I do not want to do that.
    >>> OK, good decision ;)
    >>> One approach would be for some brave soul to pick his way through
    >>> the reboot code and ensure that we are correctly and reliably setting
    >>> system_state to SYSTEM_RESTART, then test that in __might_sleep().
    >>> But this does suppress somewhat-useful debugging just because of sysrq-B
    >>> and I really wouldn't want to utilise the horrid system_state any more that
    >>> we are presently doing. I think on balance that it would be better if we
    >>> could do something more targetted, like modify emergency_restart() to test
    >>> in_interrupt() and to then apologetically set some well-named global flag
    >>> which will shut up __might_sleep(). Pretty foul, but I can't think of
    >>> anything better.
    >> ok, this might be better. How about we just stop calling mach_reboot_fixups()
    >> at sysrq-B time?
    > Fine with me, but what hardware will be messed up because of this?

    static struct device_fixup fixups_table[] = {
    > > cs5530a_warm_reset },
    > > { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
    > > };
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      Last update: 2007-08-07 09:53    [W:0.023 / U:9.676 seconds]
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