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Miller" , Jakub Kicinski , Paolo Abeni , "moderated list:INTEL ETHERNET DRIVERS" , open list Subject: Re: [PATCH net] ice: Fix MAC address setting Message-ID: References: <20220323135829.4015645-1-ivecera@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-3.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 23, 2022 at 05:28:02PM +0000, Keller, Jacob E wrote: > > > > -----Original Message----- > > From: Ivan Vecera > > Sent: Wednesday, March 23, 2022 6:58 AM > > To: netdev@vger.kernel.org > > Cc: poros@redhat.com; mschmidt@redhat.com; Brandeburg, Jesse > > ; Nguyen, Anthony L > > ; David S. Miller ; Jakub > > Kicinski ; Paolo Abeni ; moderated > > list:INTEL ETHERNET DRIVERS ; open list > kernel@vger.kernel.org> > > Subject: [PATCH net] ice: Fix MAC address setting > > > > Commit 2ccc1c1ccc671b ("ice: Remove excess error variables") merged > > the usage of 'status' and 'err' variables into single one in > > function ice_set_mac_address(). Unfortunately this causes > > a regression when call of ice_fltr_add_mac() returns -EEXIST because > > this return value does not indicate an error in this case but > > value of 'err' value remains to be -EEXIST till the end of s/'err' value/'err' > > the function and is returned to caller. > > > > Prior this commit this does not happen because return value of s/this/mentioned ? > > ice_fltr_add_mac() was stored to 'status' variable first and > > if it was -EEXIST then 'err' remains to be zero. > > > > The patch fixes the problem by reset 'err' to zero when > > ice_fltr_add_mac() returns -EEXIST. Again, i'd recommend imperative mood. Besides, good catch! > > > > Fixes: 2ccc1c1ccc671b ("ice: Remove excess error variables") > > Signed-off-by: Ivan Vecera > > --- > > drivers/net/ethernet/intel/ice/ice_main.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/net/ethernet/intel/ice/ice_main.c > > b/drivers/net/ethernet/intel/ice/ice_main.c > > index 168a41ea37b8..420558d1cd21 100644 > > --- a/drivers/net/ethernet/intel/ice/ice_main.c > > +++ b/drivers/net/ethernet/intel/ice/ice_main.c > > @@ -5474,14 +5474,15 @@ static int ice_set_mac_address(struct net_device > > *netdev, void *pi) > > > > /* Add filter for new MAC. If filter exists, return success */ > > err = ice_fltr_add_mac(vsi, mac, ICE_FWD_TO_VSI); > > - if (err == -EEXIST) > > + if (err == -EEXIST) { > > /* Although this MAC filter is already present in hardware it's > > * possible in some cases (e.g. bonding) that dev_addr was > > * modified outside of the driver and needs to be restored back > > * to this value. > > */ > > netdev_dbg(netdev, "filter for MAC %pM already exists\n", mac); > > - else if (err) > > + err = 0; > > + } else if (err) > > /* error if the new filter addition failed */ > > err = -EADDRNOTAVAIL; > > > > Style wise, don't we typically use {} for all branches if its needed on one? +1, please add braces around second branch as well. > > I'm ok takin this fix as-is now and doing the {} fix up afterwards if we want to avoid delay. > > Thanks, > Jake > > > -- > > 2.34.1 >