netdev - [PATCH net-next] net: phy: aquantia: do not return an error on clearing pending IRQs

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: <20201109154601.3812574-1-ciorneiioana@gmail.com>
Date:   Mon,  9 Nov 2020 17:46:01 +0200
From:   Ioana Ciornei <ciorneiioana@...il.com>
To:     kuba@...nel.org, netdev@...r.kernel.org
Cc:     Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH net-next] net: phy: aquantia: do not return an error on clearing pending IRQs

From: Ioana Ciornei <ioana.ciornei@....com>

The referenced commit added in .config_intr() the part of code which upon
configuration of the IRQ state it also clears up any pending IRQ. If
there were actually pending IRQs, a read on the IRQ status register will
return something non zero. This should not result in the callback
returning an error.

Fix this by returning an error only when the result of the
phy_read_mmd() is negative.

Fixes: e11ef96d44f1 ("net: phy: aquantia: remove the use of .ack_interrupt()")
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/net/phy/aquantia_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/aquantia_main.c b/drivers/net/phy/aquantia_main.c
index 345f70f9d39b..968dd43a2b1e 100644
--- a/drivers/net/phy/aquantia_main.c
+++ b/drivers/net/phy/aquantia_main.c
@@ -250,7 +250,7 @@ static int aqr_config_intr(struct phy_device *phydev)
 	if (en) {
 		/* Clear any pending interrupts before enabling them */
 		err = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_TX_VEND_INT_STATUS2);
-		if (err)
+		if (err < 0)
 			return err;
 	}
 
@@ -273,7 +273,7 @@ static int aqr_config_intr(struct phy_device *phydev)
 	if (!en) {
 		/* Clear any pending interrupts after we have disabled them */
 		err = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_TX_VEND_INT_STATUS2);
-		if (err)
+		if (err < 0)
 			return err;
 	}
 
-- 
2.28.0