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SubjectRe: [PATCH RFC 34/77] ioat: Update MSI/MSI-X interrupts enablement code
On Wed, Oct 02, 2013 at 11:00:51AM -0700, Williams, Dan J wrote:
> I see patch 00/77 now and I still don't see the need for ioatdma to be
> updated. If we fail the subsequent request_irq, the driver will still
> fall back to trying less interrupts.

In the proposed design pci_enable_msix() will never return a positive value.
Therefore if the driver is not updated it will fallback to single MSI if
device->common.chancnt MSI-X vectors were not allocated while it used to
fallback to a single MSI-X in the same situation. Not to mention 'if (err > 0)'
dead code.

Alexander Gordeev

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