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
| ||
|
Date: Mon, 22 Jul 2013 22:09:18 -0300 From: Emilio López <emilio@...pez.com.ar> To: Maxime Ripard <maxime.ripard@...e-electrons.com>, davem@...emloft.net Cc: netdev@...r.kernel.org, Emilio López <emilio@...pez.com.ar> Subject: [PATCH] net: sun4i: fix timeout check The current timeout check is comparing two constant values, so it won't ever detect a timeout. This patch reworks the affected code a bit so it has a chance at detecting timeouts correctly. Signed-off-by: Emilio López <emilio@...pez.com.ar> --- drivers/net/phy/mdio-sun4i.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/net/phy/mdio-sun4i.c b/drivers/net/phy/mdio-sun4i.c index 61d3f4e..7f25e49 100644 --- a/drivers/net/phy/mdio-sun4i.c +++ b/drivers/net/phy/mdio-sun4i.c @@ -40,7 +40,7 @@ struct sun4i_mdio_data { static int sun4i_mdio_read(struct mii_bus *bus, int mii_id, int regnum) { struct sun4i_mdio_data *data = bus->priv; - unsigned long start_jiffies; + unsigned long timeout_jiffies; int value; /* issue the phy address and reg */ @@ -49,10 +49,9 @@ static int sun4i_mdio_read(struct mii_bus *bus, int mii_id, int regnum) writel(0x1, data->membase + EMAC_MAC_MCMD_REG); /* Wait read complete */ - start_jiffies = jiffies; + timeout_jiffies = jiffies + MDIO_TIMEOUT; while (readl(data->membase + EMAC_MAC_MIND_REG) & 0x1) { - if (time_after(start_jiffies, - start_jiffies + MDIO_TIMEOUT)) + if (time_is_before_jiffies(timeout_jiffies)) return -ETIMEDOUT; msleep(1); } @@ -69,7 +68,7 @@ static int sun4i_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) { struct sun4i_mdio_data *data = bus->priv; - unsigned long start_jiffies; + unsigned long timeout_jiffies; /* issue the phy address and reg */ writel((mii_id << 8) | regnum, data->membase + EMAC_MAC_MADR_REG); @@ -77,10 +76,9 @@ static int sun4i_mdio_write(struct mii_bus *bus, int mii_id, int regnum, writel(0x1, data->membase + EMAC_MAC_MCMD_REG); /* Wait read complete */ - start_jiffies = jiffies; + timeout_jiffies = jiffies + MDIO_TIMEOUT; while (readl(data->membase + EMAC_MAC_MIND_REG) & 0x1) { - if (time_after(start_jiffies, - start_jiffies + MDIO_TIMEOUT)) + if (time_is_before_jiffies(timeout_jiffies)) return -ETIMEDOUT; msleep(1); } -- 1.8.3.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists