Roland Dreier wrote: > > I am now wondering whether the usage of MSI would help in this case and > > that i should be using enable_msi before request_irq ? > > MSI interrupts are never shared. So if pci_enable_msi() succeeds, you > can be sure that the interrupts you get with that IRQ number are > coming from your device. >
i presume then i shouldn't be using IRQF_SHARED, if using MSI. Another question would be if the device supports multiple messages, MSIX should be used ? In such a context, if i request for say more than the messages that i need, say i request 16 messages, but use only 1 or 2, that does bear any consequences ? > But using MSI does not work on all systems, so your driver needs to > work with standard (possibly shared) INTx interrupts too. And you > should probably provide at least a module flag to disable the use of > MSI, to avoid problems on buggy systems. I should probably look for CONFIG_PCI_MSI and check whether the system supports MSI pci_enable_msi() ? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
