On Thursday 07 May 2009 17:27:31 Matthew Wilcox wrote: > On Thu, May 07, 2009 at 04:51:24PM +0800, Sheng Yang wrote: > > On Thursday 07 May 2009 16:28:41 Michael S. Tsirkin wrote: > > > pci_enable_msix currently returns -EINVAL if you ask > > > for more vectors than supported by the device, which would > > > typically cause fallback to regular interrupts. > > > > > > It's better to return the table size, making the driver retry > > > MSI-X with less vectors. > > > > Hi Michael > > > > I think driver should read from capability list to know how many vector > > supported by this device before enable MSI-X for device, as > > pci_msix_table_size() did... > > I think Michael's patch makes sense. It reduces the amount of work the > driver has to do without requiring any additional work in the core. I > don't see the disadvantage to it. > > Reviewed-by: Matthew Wilcox <wi...@linux.intel.com>
It's indeed weird. Why the semantic of pci_enable_msix can be changed to "enable msix, or tell me how many vector do you have"? You can simply call pci_msix_table_size() to get what you want, also without any more work, no? I can't understand... -- regards Yang, Sheng -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
