netdev - Re: [PATCH 3.3.0] phy:icplus:fix Auto Power Saving in ip101a_config

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

Message-ID: <20120509072537.GA437@burratino>
Date:	Wed, 9 May 2012 02:25:37 -0500
From:	Jonathan Nieder <jrnieder@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	srinivas.kandagatla@...com, netdev@...r.kernel.org,
	peppe.cavallaro@...com
Subject: Re: [PATCH 3.3.0] phy:icplus:fix Auto Power Saving in
 ip101a_config_init.

Hi Dave,

David Miller wrote:
> From: Srinivas KANDAGATLA <srinivas.kandagatla@...com>

>> This patch fixes Auto Power Saving configuration in ip101a_config_init
>> which was broken as there is no phy register write followed after
>> setting IP101A_APS_ON flag.
>>
>> This patch also fixes the return value of ip101a_config_init.
>>
>> Without this patch ip101a_config_init returns 2 which is not an error
>> accroding to IS_ERR and the mac driver will continue accessing 2 as
>> valid pointer to phy_dev resulting in memory fault.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...com>
>
> Applied and queued up for -stable, thanks.

I'm guessing 3.2.y needs this, too, since it also includes
v3.2-rc1~129^2~247 ("net/phy: add IC+ IP101A and support APS").

Here's a quick backport made by adjusting the context line to
use IP101A_APS_ON instead of IP101A_G_APS_ON.

Please include it in some later stable update if appropriate.

Thanks,
Jonathan

-- >8 --
From: Srinivas Kandagatla <srinivas.kandagatla@...com>
Date: Mon, 2 Apr 2012 00:02:09 +0000

[ Upstream commit b3300146aa8efc5d3937fd33f3cfdc580a3843bc ]

This patch fixes Auto Power Saving configuration in ip101a_config_init
which was broken as there is no phy register write followed after
setting IP101A_APS_ON flag.

This patch also fixes the return value of ip101a_config_init.

Without this patch ip101a_config_init returns 2 which is not an error
accroding to IS_ERR and the mac driver will continue accessing 2 as
valid pointer to phy_dev resulting in memory fault.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jonathan Nieder <jrnieder@...il.com>
---
 drivers/net/phy/icplus.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index c81f136ae670..b14230016d9b 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -150,7 +150,8 @@ static int ip101a_config_init(struct phy_device *phydev)
 	/* Enable Auto Power Saving mode */
 	c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
 	c |= IP101A_APS_ON;
-	return c;
+
+	return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
 }
 
 static int ip175c_read_status(struct phy_device *phydev)
-- 
1.7.10.1

--
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