Re: [PATCH RFC v2 12/29] PCI/MSI: Introduce pcim_enable_msi*()family helpers

From: Alexander Gordeev
Date: Thu Oct 24 2013 - 10:29:29 EST

On Thu, Oct 24, 2013 at 11:51:58AM +0100, Tejun Heo wrote:
> I haven't looked into any details but, if the above works for most use
> cases, it looks really good to me.

Well, if we reuse Michael's statistics:

- 58 drivers call pci_enable_msix()
- 24 try a single allocation and then fallback to MSI/LSI
- 19 use the loop style allocation
- 14 try an allocation, and if it fails retry once

...then I expect most of 19/58 (loop style) could be converted to
pcim_enable_msix() and pcim_enable_msix_range() and all of 14/58
(single fallback) should be converted to pcim_enable_msix() users.

> tejun

Alexander Gordeev
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