[dpdk-stable] [PATCH] igb_uio: revert open and release operations

Thomas Monjalon thomas at monjalon.net
Tue Oct 17 22:33:56 CEST 2017

17/10/2017 22:14, Ferruh Yigit:
> There were bug reports about terminated application may leave device in
> undesired state:
> http://dpdk.org/ml/archives/dev/2016-November/049745.html
> http://dpdk.org/ml/archives/dev/2016-November/050932.html
> And a proposal to fix:
> http://dpdk.org/ml/archives/dev/2016-December/051844.html
> Later another proposal triggered the discussion:
> http://dpdk.org/ml/archives/dev/2017-May/066317.html
> Finally a fix patch pushed into v17.08:
> Commit: b58eedfc7dd5 ("igb_uio: issue FLR during open and release of device file")
> Later a regression report sent related to the pushed patch:
> http://dpdk.org/ml/archives/dev/2017-September/075236.html
> And a fix for regression integrated into v17.11-rc1:
> http://dpdk.org/ml/archives/dev/2017-October/079166.html
> Commit: 5f6ff30dc507 ("igb_uio: fix interrupt enablement after FLR in VM")
> Commit: 6b9ed026a870 ("igb_uio: fix build with kernel <= 3.17")
> Even after the fix qede PMD reported to be broken:
> http://dpdk.org/ml/archives/dev/2017-October/079359.html
> So this patch reverts original fix and related commits. The related
> igb_uio code part turns back to v17.05 base.
> ---
> It would be nice to solve this issue in LTS release, but being close to
> the release and the error report without details makes it hard to work
> more on this issue.

With this revert, we are back to the original issue.
We must really try the proposed solution.
Harish, please describe your issue and think how it could be fixed.
Jingjing made it work for i40e.
I know it is less effort to request a simple revert.
Please let's try to fix it once for all.

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