From: [EMAIL PROTECTED] (Linas Vepstas)
Date: Fri, 19 Oct 2007 19:46:10 -0500
> FWIW, it looks like not all that many arches do this; the output
> for grep -r address_hi * is pretty thin. Then, looking at
> i386/kernel/io_apic.c as an example, one can see that the
> msi state save happens "by accident" if CONFIG_SMP is enabled;
> and so its surely broekn on uniprocesor machines.
I don't see this, in all cases write_msi_msg() will transfer
the given "*msg" to entry->msg by this assignment in
drivers/pci/msi.c:
void write_msi_msg(unsigned int irq, struct msi_msg *msg)
{
...
entry->msg = *msg;
}
So as long as write_msi_msg() is invoked, it will be saved
properly.
Platforms need not do this explicitly.
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