Re: [dpdk-stable] [dpdk-dev] [PATCH] net/bnxt: fix a segfault encountered during PMD exit

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

On Tue, Nov 15, 2016 at 8:19 PM, Yuanhan Liu <yuanhan.liu@linux.intel.com>
wrote:

> Hi Ajit,
>
> Thanks for the backport. Few minor comments though:
>
> - the dev mailing list should not be cc'ed (thus I removed it).
>
> - the commit log should not be changed, except an extra line is needed:
>
>   [ backported from upstream commit 316e412299fde9f8f099ef957aa04dc6c43d02a2
> ]
>
​I had cloned the dpdk-stable for the first time. So it did not have the
usual git hooks.
By the time I got the email about the checkpatch failure, it was late
anyway.
​


>
> You could either send another veresion, or I will handle it (copy &
> ​​
> paste the original commit log) for you while apply.
>
​If it isn't much, could you just use this version and do the copy-paste
this time.
​Otherwise I will send something out tomorrow. My laptop battery is almost
out of power.

Thanks
Ajit

>
> Thanks.
>
>         --yliu
>
> On Tue, Nov 15, 2016 at 05:06:29PM -0600, Ajit Khaparde wrote:
> > This patch fixes segfault encountered during dev_uninit/close routine.
> > KNI sample app can be used to reproduce the issue.
> >
> > backported from upstream commit 316e412
> >
> > Cc: <stable@dpdk.org>
> > Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
> > ---
> >  drivers/net/bnxt/bnxt.h        |  1 +
> >  drivers/net/bnxt/bnxt_ethdev.c | 28 ++++++++++++++++++----------
> >  2 files changed, 19 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
> > index df1f771..0e21ace 100644
> > --- a/drivers/net/bnxt/bnxt.h
> > +++ b/drivers/net/bnxt/bnxt.h
> > @@ -171,6 +171,7 @@ struct bnxt {
> >
> >       struct bnxt_pf_info             pf;
> >       struct bnxt_vf_info             vf;
> > +     uint8_t                 dev_stopped;
> >  };
> >
> >  #endif
> > diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_
> ethdev.c
> > index 3795fac..deeb54c 100644
> > --- a/drivers/net/bnxt/bnxt_ethdev.c
> > +++ b/drivers/net/bnxt/bnxt_ethdev.c
> > @@ -384,6 +384,7 @@ static int bnxt_dev_start_op(struct rte_eth_dev
> *eth_dev)
> >       struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
> >       int rc;
> >
> > +     bp->dev_stopped = 0;
> >       rc = bnxt_hwrm_func_reset(bp);
> >       if (rc) {
> >               RTE_LOG(ERR, PMD, "hwrm chip reset failure rc: %x\n", rc);
> > @@ -427,16 +428,6 @@ static int bnxt_dev_set_link_down_op(struct
> rte_eth_dev *eth_dev)
> >       return 0;
> >  }
> >
> > -static void bnxt_dev_close_op(struct rte_eth_dev *eth_dev)
> > -{
> > -     struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
> > -
> > -     bnxt_free_tx_mbufs(bp);
> > -     bnxt_free_rx_mbufs(bp);
> > -     bnxt_free_mem(bp);
> > -     rte_free(eth_dev->data->mac_addrs);
> > -}
> > -
> >  /* Unload the driver, release resources */
> >  static void bnxt_dev_stop_op(struct rte_eth_dev *eth_dev)
> >  {
> > @@ -449,6 +440,19 @@ static void bnxt_dev_stop_op(struct rte_eth_dev
> *eth_dev)
> >       bnxt_shutdown_nic(bp);
> >  }
> >
> > +static void bnxt_dev_close_op(struct rte_eth_dev *eth_dev)
> > +{
> > +     struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
> > +
> > +     if (bp->dev_stopped == 0)
> > +             bnxt_dev_stop_op(eth_dev);
> > +
> > +     bnxt_free_tx_mbufs(bp);
> > +     bnxt_free_rx_mbufs(bp);
> > +     bnxt_free_mem(bp);
> > +     rte_free(eth_dev->data->mac_addrs);
> > +}
> > +
> >  static void bnxt_mac_addr_remove_op(struct rte_eth_dev *eth_dev,
> >                                   uint32_t index)
> >  {
> > @@ -1021,6 +1025,8 @@ bnxt_dev_init(struct rte_eth_dev *eth_dev)
> >               eth_dev->pci_dev->mem_resource[0].phys_addr,
> >               eth_dev->pci_dev->mem_resource[0].addr);
> >
> > +     bp->dev_stopped = 0;
> > +
> >       return 0;
> >
> >  error_free:
> > @@ -1040,6 +1046,8 @@ bnxt_dev_uninit(struct rte_eth_dev *eth_dev) {
> >               rte_free(bp->grp_info);
> >       rc = bnxt_hwrm_func_driver_unregister(bp, 0);
> >       bnxt_free_hwrm_resources(bp);
> > +     if (bp->dev_stopped == 0)
> > +             bnxt_dev_close_op(eth_dev);
> >       return rc;
> >  }
> >
> > --
> > 2.8.4 (Apple Git-73)
>