[Bug 932] tap stop fails because of 'tap_lsc_intr_handle_set()' failure

[kumaraparameshwaran rathinavel]

On Tue, Feb 1, 2022, 10:34 PM <bugzilla at dpdk.org> wrote:

> https://bugs.dpdk.org/show_bug.cgi?id=932
>
>             Bug ID: 932
>            Summary: tap stop fails because of 'tap_lsc_intr_handle_set()'
>                     failure
>            Product: DPDK
>            Version: 20.11
>           Hardware: All
>                 OS: All
>             Status: UNCONFIRMED
>           Severity: normal
>           Priority: Normal
>          Component: ethdev
>           Assignee: dev at dpdk.org
>           Reporter: ferruh.yigit at intel.com
>   Target Milestone: ---
>
> Reproduced with testpmd with following command flow:
>
> ./build/app/dpdk-testpmd --vdev net_tap0 --vdev net_tap1 --vdev net_tap2
> -- -i
>
> > start tx_first
> > stop
> > quit
>
> Log:
> Stopping port 2...
> Stopping ports...
> tap_lsc_intr_handle_set(): intr callback unregister failed: -2
> free(): invalid pointer
> Aborted (core dumped)
>
>
> Quick debug shows that in 'pmd->intr_handle->fd' is '0' may be reason of
> the
> error.
> Ferruh, I think this because of the intr_vec, so there should be a way to
> differentiate if vec was used or not ? Or should we just assume that if the
> fd is 0 then intr_vec was installed. ?

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