From patchwork Wed Jun 22 17:40:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v3] net: smsc911x: Fix bug where PHY interrupts are overwritten by 0 From: Jeremy Linton X-Patchwork-Id: 639331 X-Patchwork-Delegate: davem@davemloft.net Message-Id: <1466617250-27317-1-git-send-email-jeremy.linton@arm.com> To: netdev@vger.kernel.org Cc: steve.glendinning@shawell.net, andrew@lunn.ch, sergei.shtylyov@cogentembedded.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, pbrobinson@gmail.com, mlangsdorf@redhat.com, steve.capper@arm.com Date: Wed, 22 Jun 2016 12:40:50 -0500 By default, mdiobus_alloc() sets the PHYs to polling mode, but a pointer size memcpy means that a couple IRQs end up being overwritten with a value of 0. This means that PHY_POLL is disabled and results in unpredictable behavior depending on the PHY's location on the MDIO bus. Remove that memcpy and the now unused phy_irq member to force the SMSC911x PHYs into polling mode 100% of the time. Fixes: e7f4dc3536a4 ("mdio: Move allocation of interrupts into core") Signed-off-by: Jeremy Linton Reviewed-by: Andrew Lunn Acked-by: Sergei Shtylyov --- drivers/net/ethernet/smsc/smsc911x.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c index 8af2556..b5ab5e1 100644 --- a/drivers/net/ethernet/smsc/smsc911x.c +++ b/drivers/net/ethernet/smsc/smsc911x.c @@ -116,7 +116,6 @@ struct smsc911x_data { struct phy_device *phy_dev; struct mii_bus *mii_bus; - int phy_irq[PHY_MAX_ADDR]; unsigned int using_extphy; int last_duplex; int last_carrier; @@ -1073,7 +1072,6 @@ static int smsc911x_mii_init(struct platform_device *pdev, pdata->mii_bus->priv = pdata; pdata->mii_bus->read = smsc911x_mii_read; pdata->mii_bus->write = smsc911x_mii_write; - memcpy(pdata->mii_bus->irq, pdata->phy_irq, sizeof(pdata->mii_bus)); pdata->mii_bus->parent = &pdev->dev;