LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: "Liu, Yongxin" <Yongxin.Liu@windriver.com>
To: "Ertman, David M" <david.m.ertman@intel.com>,
	Leon Romanovsky <leon@kernel.org>
Cc: "Saleem, Shiraz" <shiraz.saleem@intel.com>,
	"Nguyen, Anthony L" <anthony.l.nguyen@intel.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
	"intel-wired-lan@lists.osuosl.org"
	<intel-wired-lan@lists.osuosl.org>,
	"kuba@kernel.org" <kuba@kernel.org>
Subject: RE: [PATCH net] ice: check whether AUX devices/drivers are supported in ice_rebuild
Date: Wed, 8 Sep 2021 19:14:47 +0000	[thread overview]
Message-ID: <PH0PR11MB517545D35B7B90A5A3FCA3A1E5D49@PH0PR11MB5175.namprd11.prod.outlook.com> (raw)
In-Reply-To: <SJ0PR11MB49752B60CA91811492A9341EDDD49@SJ0PR11MB4975.namprd11.prod.outlook.com>

> -----Original Message-----
> From: Ertman, David M <david.m.ertman@intel.com>
> Sent: Thursday, September 9, 2021 1:31 AM
> To: Leon Romanovsky <leon@kernel.org>; Liu, Yongxin
> <Yongxin.Liu@windriver.com>
> Cc: Saleem, Shiraz <shiraz.saleem@intel.com>; Nguyen, Anthony L
> <anthony.l.nguyen@intel.com>; netdev@vger.kernel.org; linux-
> kernel@vger.kernel.org; davem@davemloft.net; Brandeburg, Jesse
> <jesse.brandeburg@intel.com>; intel-wired-lan@lists.osuosl.org;
> kuba@kernel.org
> Subject: RE: [PATCH net] ice: check whether AUX devices/drivers are supported
> in ice_rebuild
> 
> > -----Original Message-----
> > From: Leon Romanovsky <leon@kernel.org>
> > Sent: Sunday, September 5, 2021 12:24 AM
> > To: Yongxin Liu <yongxin.liu@windriver.com>
> > Cc: Ertman, David M <david.m.ertman@intel.com>; Saleem, Shiraz
> > <shiraz.saleem@intel.com>; Nguyen, Anthony L
> > <anthony.l.nguyen@intel.com>; netdev@vger.kernel.org; linux-
> > kernel@vger.kernel.org; davem@davemloft.net; Brandeburg, Jesse
> > <jesse.brandeburg@intel.com>; intel-wired-lan@lists.osuosl.org;
> > kuba@kernel.org
> > Subject: Re: [PATCH net] ice: check whether AUX devices/drivers are
> > supported in ice_rebuild
> >
> > On Fri, Sep 03, 2021 at 09:25:00AM +0800, Yongxin Liu wrote:
> > > In ice_rebuild(), check whether AUX devices/drivers are supported or
> > > not before calling ice_plug_aux_dev().
> > >
> > > Fix the following call trace, if RDMA functionality is not available.
> > >
> > >   auxiliary ice.roce.0: adding auxiliary device failed!: -17
> > >   sysfs: cannot create duplicate filename
> '/bus/auxiliary/devices/ice.roce.0'
> > >   Workqueue: ice ice_service_task [ice]
> > >   Call Trace:
> > >    dump_stack_lvl+0x38/0x49
> > >    dump_stack+0x10/0x12
> > >    sysfs_warn_dup+0x5b/0x70
> > >    sysfs_do_create_link_sd.isra.2+0xc8/0xd0
> > >    sysfs_create_link+0x25/0x40
> > >    bus_add_device+0x6d/0x110
> > >    device_add+0x49d/0x940
> > >    ? _printk+0x52/0x6e
> > >    ? _printk+0x52/0x6e
> > >    __auxiliary_device_add+0x60/0xc0
> > >    ice_plug_aux_dev+0xd3/0xf0 [ice]
> > >    ice_rebuild+0x27d/0x510 [ice]
> > >    ice_do_reset+0x51/0xe0 [ice]
> > >    ice_service_task+0x108/0xe70 [ice]
> > >    ? __switch_to+0x13b/0x510
> > >    process_one_work+0x1de/0x420
> > >    ? apply_wqattrs_cleanup+0xc0/0xc0
> > >    worker_thread+0x34/0x400
> > >    ? apply_wqattrs_cleanup+0xc0/0xc0
> > >    kthread+0x14d/0x180
> > >    ? set_kthread_struct+0x40/0x40
> > >    ret_from_fork+0x1f/0x30
> > >
> > > Fixes: f9f5301e7e2d ("ice: Register auxiliary device to provide
> > > RDMA")
> > > Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com>
> > > ---
> > >  drivers/net/ethernet/intel/ice/ice_main.c | 4 +++-
> > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/net/ethernet/intel/ice/ice_main.c
> > b/drivers/net/ethernet/intel/ice/ice_main.c
> > > index 0d6c143f6653..98cc708e9517 100644
> > > --- a/drivers/net/ethernet/intel/ice/ice_main.c
> > > +++ b/drivers/net/ethernet/intel/ice/ice_main.c
> > > @@ -6466,7 +6466,9 @@ static void ice_rebuild(struct ice_pf *pf,
> > > enum
> > ice_reset_req reset_type)
> > >     /* if we get here, reset flow is successful */
> > >     clear_bit(ICE_RESET_FAILED, pf->state);
> > >
> > > -   ice_plug_aux_dev(pf);
> > > +   if (ice_is_aux_ena(pf))
> > > +           ice_plug_aux_dev(pf);
> > > +
> >
> > The change is ok, but it hints that auxiliary bus is used horribly
> > wrong in this driver. In proper implementation, which should rely on
> > driver/core, every subdriver like ice.eth, ice.roce e.t.c is supposed
> > to be retriggered by the code and shouldn't  ave "if (ice_is_aux_ena(pf))"
> checks.
> >
> > Thanks
> 
> Hi Leon and Liu -
> 
> First of all, thanks Liu for tracking this down - it is an issue that needs
> to be fixed.  The ice_is_aux_ena() functions only purpose is to determine if
> this PF supports RDMA functionality.  In probe(), the aux devices are not
> even initialized if this test returns false.  If this check fixed the issue
> for you, the PF you are on does not currently support RDMA.
> The bit this test is based on is only set one place in the driver currently -
> at probe time when we are checking the capabilities (common_caps) of the
> device.
> 
> That being said, the call to check this should be in ice_plug_aux_dev
> function itself.  That way it is taken into account for all attempts to
> create the auxiliary device.  There is another consideration about disabling
> RDMA that needs to also needs to be taken into account to avoid a similar
> situation.
> 
> If it is acceptable, I will create a new patch today and get it out either
> this afternoon or tomorrow.

Thanks Leon and Dave E for your quick response and input.
Please go ahead and I am expecting this issue to be fixed in a more reasonable way.

Thanks,
Yongxin

> 
> Thanks,
> Dave E
> 
> >
> > >     return;
> > >
> > >  err_vsi_rebuild:
> > > --
> > > 2.14.5
> > >

      reply	other threads:[~2021-09-08 19:15 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-03  1:25 Yongxin Liu
2021-09-05  7:23 ` Leon Romanovsky
2021-09-08 17:30   ` Ertman, David M
2021-09-08 19:14     ` Liu, Yongxin [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=PH0PR11MB517545D35B7B90A5A3FCA3A1E5D49@PH0PR11MB5175.namprd11.prod.outlook.com \
    --to=yongxin.liu@windriver.com \
    --cc=anthony.l.nguyen@intel.com \
    --cc=davem@davemloft.net \
    --cc=david.m.ertman@intel.com \
    --cc=intel-wired-lan@lists.osuosl.org \
    --cc=jesse.brandeburg@intel.com \
    --cc=kuba@kernel.org \
    --cc=leon@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=shiraz.saleem@intel.com \
    --subject='RE: [PATCH net] ice: check whether AUX devices/drivers are supported in ice_rebuild' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).