On Tue, Dec 17, 2013 at 05:30:02PM -0700, Bjorn Helgaas wrote: > > +int pci_auto_enable_msi_range(struct pci_dev *dev, struct msix_entry *entries, > > + int minvec, int maxvec) [...] > > +If this function returns a positive number it indicates at least the > > +returned number of MSI interrupts have been successfully allocated (it may > > +have allocated more in order to satisfy the power-of-two requirement). > > I assume this means the return value may be larger than the "maxvec" > requested, right? And the driver is free to use all the vectors up to the > return value, even those above maxvec, right? No, the returned value may not be larger than the "maxvec" ever. This is just paraphrasing the semantics of exisitng pci_enable_msi_block() interface - a value written to MMC register might be larger than the returned value, but the driver may not use the extra vectors it did not request. -- Regards, Alexander Gordeev agordeev@xxxxxxxxxx -- 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
