lkml.org 
[lkml]   [2013]   [Oct]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 2/6] PCI/MSI: Factor out pci_get_msi_cap() interface
On Tue, Oct 01, 2013 at 10:46:32PM -0400, Mark Lord wrote:
> >>> The last pattern makes most of sense to me and could be updated with a more
> >>> clear sequence - a call to (bit modified) pci_msix_table_size() followed
> >>> by a call to pci_enable_msix(). I think this pattern can effectively
> >>> supersede the currently recommended "loop" practice.
> >>
> >> The loop is still necessary, because there's a race between those two calls,
> >> so that pci_enable_msix() can still fail due to lack of MSIX slots.
> >
> > Moreover, the existing loop pattern is racy and could fail just as easily ;)
>
> Yes, but it then loops again to correct things.

No. If it failed it should exit the loop.

--
Regards,
Alexander Gordeev
agordeev@redhat.com


\
 
 \ /
  Last update: 2013-10-02 09:41    [W:0.317 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site