Hi folks ! Do we provide drivers any guarantee to what happen if an MSI is shot while masked with disable_irq() or while not yet request_irq()'ed ? Do we guarantee delivery (latched while masked), non-delivery, or undefined ? I'm bringing up a piece of HW where if it happened, it won't be automatically sent to the CPU and can block further MSIs unless I explicitly either ditch it or force a resend when unmasking (at the PCI Express controller PIC level). I'm tempted to just ditch anything that happened while masked, it would make everything easier on my side, but maybe drivers have different expectations (and of course an LSI would still shoot, that's not an issue, only MSIs are in question here). I have cases of devices continuing to shoot one or two MSIs after kexec and before the new kernel takes over, causing a "loss" of any subsequent one unless I deal with that case one way or another. Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
