On Tue, Oct 23, 2007 at 07:24:27AM +1000, Benjamin Herrenschmidt wrote: > > On Mon, 2007-10-22 at 13:13 -0500, Linas Vepstas wrote: > > On Mon, Oct 22, 2007 at 11:49:24AM +1000, Michael Ellerman wrote: > > > > > > On pseries there's a chance it will work for PCI error recovery, but if > > > so it's just lucky that firmware has left everything configured the same > > > way. > > > > ? The papr is quite clear that i is up to the OS to restore the msi > > state after an eeh error. > > Via direct config space access or via firmware change-msi calls ?
Direct config space access. It says that the OS is supposed to read the MSI config (after its been set up), save it, and restore it, (via direct config space writes) if the device is ever reset. > I don't know why you keep talking about powerpc laptops here ... Well, there are Apple laptops, right? Aren't those the "powermac" platform? Now, I don't know if they support MSI, but if they do, I get the impression that they might not restore msi state correctly, after being put into hardware suspend. But perhaps I'm mistaken; I was simply grepping for various msi-related functions in various arch subdirectories, comparing x86 to other arches, and noticed that code that would restore msi state seems to be missing for most arches and most powerpc platforms. --linas - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
