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Thu, 12 Jun 2025 06:42:59 -0700 (PDT) Date: Thu, 12 Jun 2025 16:42:56 +0300 From: Joe Damato To: Shannon Nelson Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, brett.creeley@amd.com Subject: Re: [PATCH net-next 2/3] ionic: clean dbpage in de-init Message-ID: Mail-Followup-To: Joe Damato , Shannon Nelson , andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, brett.creeley@amd.com References: <20250609214644.64851-1-shannon.nelson@amd.com> <20250609214644.64851-3-shannon.nelson@amd.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250609214644.64851-3-shannon.nelson@amd.com> On Mon, Jun 09, 2025 at 02:46:43PM -0700, Shannon Nelson wrote: > Since the kern_dbpage gets set up in ionic_lif_init() and that > function's error path will clean it if needed, the kern_dbpage > on teardown should be cleaned in ionic_lif_deinit(), not in > ionic_lif_free(). As it is currently we get a double call > to iounmap() on kern_dbpage if the PCI ionic fails setting up > the lif. One example of this is when firmware isn't responding > to AdminQ requests and ionic's first AdminQ call fails to > setup the NotifyQ. > > Signed-off-by: Shannon Nelson > --- > drivers/net/ethernet/pensando/ionic/ionic_lif.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c > index 7707a9e53c43..48cb5d30b5f6 100644 > --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c > +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c > @@ -3526,10 +3526,6 @@ void ionic_lif_free(struct ionic_lif *lif) > lif->info = NULL; > lif->info_pa = 0; > > - /* unmap doorbell page */ > - ionic_bus_unmap_dbpage(lif->ionic, lif->kern_dbpage); > - lif->kern_dbpage = NULL; > - > mutex_destroy(&lif->config_lock); > mutex_destroy(&lif->queue_lock); > > @@ -3555,6 +3551,9 @@ void ionic_lif_deinit(struct ionic_lif *lif) > ionic_lif_qcq_deinit(lif, lif->notifyqcq); > ionic_lif_qcq_deinit(lif, lif->adminqcq); > > + ionic_bus_unmap_dbpage(lif->ionic, lif->kern_dbpage); > + lif->kern_dbpage = NULL; > + Seems fine to me; my only minor nit that you can probably ignore is that the code to unmap the page and set kern_dbpage to NULL is repeated, as you mentioned, in ionic_lif_init's error path. Not sure if it's worth adding a wrapper to avoid the repetition. In either case: Reviewed-by: Joe Damato