On Thu, Apr 17, 2014 at 06:06:15PM +0200, Alexander Gordeev wrote: > In multiple MSI mode all AHCI ports (including dummy) get > assigned separate MSI vectors and (as result of execution > pci_enable_msi_exact() function) separate IRQ numbers, > (mapped to the MSI vectors). > > Therefore, although interrupts from dummy ports are not > desired they are still enabled. We do not request IRQs > for dummy ports, but that only means we do not assign > AHCI-specific ISRs to corresponding IRQ numbers. > > As result, dummy port interrupts still could come and > traverse all the way from the PCI device to the kernel, > causing unnecessary overhead. > > This update disables IRQs for dummy ports and prevents > the described issue. > > Signed-off-by: Alexander Gordeev <agord...@redhat.com> > Cc: Tejun Heo <t...@kernel.org> > Cc: David Milburn <dmilb...@redhat.com> > Cc: linux-...@vger.kernel.org
Applied to libata/for-3.15-fixes w/ David's tested-by added. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
