linux-kernel - [PATCH 1/2] net: phy: balance disable/enable irq on change

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: <1292687723-31981-1-git-send-email-jhautbois@gmail.com>
Date:	Sat, 18 Dec 2010 16:55:22 +0100
From:	Jean-Michel Hautbois <jhautbois@...il.com>
To:	davem@...emloft.net
Cc:	richard.cochran@...cron.at, shemminger@...tta.com, tj@...nel.org,
	randy.dunlap@...cle.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jean-Michel Hautbois <jhautbois@...il.com>
Subject: [PATCH 1/2] net: phy: balance disable/enable irq on change

When phy interface changes its status, it calls phy_change() function.
This function calls the interrupt disabling functions for the driver registered, but if this driver doesn't implement it, there is no IRQ disabling. After doing the work, we call enable_irq and not the respective driver function. This fixes it, as it could lead to an unbalanced IRQ.

Signed-off-by: Jean-Michel Hautbois <jhautbois@...il.com>
---
 drivers/net/phy/phy.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 7670aac..b28f2ac 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -89,7 +89,8 @@ static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
 	phydev->interrupts = interrupts;
 	if (phydev->drv->config_intr)
 		err = phydev->drv->config_intr(phydev);
-
+	else
+		err = -ENOSYS;
 	return err;
 }
 
@@ -541,6 +542,10 @@ static int phy_enable_interrupts(struct phy_device *phydev)
 		return err;
 
 	err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
+	if (err == -ENOSYS) {
+		err = 0;
+		enable_irq(phydev->irq);
+	}
 
 	return err;
 }
@@ -556,7 +561,10 @@ static int phy_disable_interrupts(struct phy_device *phydev)
 	/* Disable PHY interrupts */
 	err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
 
-	if (err)
+	if (err == -ENOSYS) {
+		err = 0;
+		disable_irq(phydev->irq);
+	} else if (err != 0)
 		goto phy_err;
 
 	/* Clear the interrupt */
-- 
1.7.0.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/