netdev - [PATCH 1/2] net: smsc911x: Fix bug where PHY interrupts are overwritten by 0

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1466092470-20958-1-git-send-email-jeremy.linton@arm.com>
Date:	Thu, 16 Jun 2016 10:54:30 -0500
From:	Jeremy Linton <jeremy.linton@....com>
To:	netdev@...r.kernel.org
Cc:	steve.glendinning@...well.net, andrew@...n.ch,
	sergei.shtylyov@...entembedded.com
Subject: [PATCH 1/2] net: smsc911x: Fix bug where PHY interrupts are overwritten by 0

By default, mdiobus_alloc() sets the PHY's to polling mode, but a
pointer size memcpy means that couple IRQs (depending
on 32-bit or 64-bit kernels) end up being overwritten with
a value of 0. This means that PHY_POLL is disabled and results
in unpredictable behavior depending on the PHYs location on the mdio
bus. Remove that memcpy and the now unused phy_irq member to force
SMSC911x PHY's into polling mode 100% of the time.

Signed-off-by: Jeremy Linton <jeremy.linton@....com>
---
 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;
 
-- 
2.5.5