> -----Original Message----- > From: Kweh, Hock Leong > Sent: Friday, January 06, 2017 6:08 PM > To: David S. Miller <da...@davemloft.net>; Joao Pinto > <joao.pi...@synopsys.com>; Giuseppe CAVALLARO <peppe.cavall...@st.com>; > seraphin.bonna...@st.com; Jarod Wilson <ja...@redhat.com>; Andy > Shevchenko <andy.shevche...@gmail.com> > Cc: Alexandre TORGUE <alexandre.tor...@gmail.com>; Joachim Eastwood > <manab...@gmail.com>; Niklas Cassel <niklas.cas...@axis.com>; Johan Hovold > <jo...@kernel.org>; pa...@ucw.cz; Kweh, Hock Leong > <hock.leong.k...@intel.com>; lars.pers...@axis.com; netdev > <netdev@vger.kernel.org>; LKML <linux-ker...@vger.kernel.org> > Subject: [PATCH v2] net: stmmac: fix maxmtu assignment to be within valid > range > > From: "Kweh, Hock Leong" <hock.leong.k...@intel.com> > > There is no checking valid value of maxmtu when getting it from device tree. > This resolution added the checking condition to ensure the assignment is made > within a valid range. > > Signed-off-by: Kweh, Hock Leong <hock.leong.k...@intel.com>
I am going to submit V3. > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > index 92ac006..4df555e 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > @@ -3345,8 +3345,14 @@ int stmmac_dvr_probe(struct device *device, > ndev->max_mtu = JUMBO_LEN; > else > ndev->max_mtu = SKB_MAX_HEAD(NET_SKB_PAD + > NET_IP_ALIGN); > - if (priv->plat->maxmtu < ndev->max_mtu) > + > + if ((priv->plat->maxmtu < ndev->max_mtu) && > + (priv->plat->maxmtu >= ndev->min_mtu)) > ndev->max_mtu = priv->plat->maxmtu; > + else if (priv->plat->maxmtu != 0) > + netdev_warn(priv->dev, > + "%s: warning: maxmtu having invalid value (%d)\n", > + __func__, priv->plat->maxmtu); > > if (flow_ctrl) > priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */ > -- > 1.7.9.5
