From: Joe Perches <joe@perches.com>
To: Igor Plyatov <plyatov@gmail.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
f.fainelli@gmail.com, luwei.zhou@freescale.com,
richardcochran@gmail.com, davem@davemloft.net,
u.kleine-koenig@pengutronix.de, Fabio.Estevam@freescale.com,
LW@KARO-electronics.de, Frank.Li@freescale.com
Subject: Re: [PATCH] net: phy: workaround for buggy cable detection by LAN8700 after cable plugging
Date: Thu, 13 Aug 2015 09:50:48 -0700 [thread overview]
Message-ID: <1439484648.4818.13.camel@perches.com> (raw)
In-Reply-To: <1439471556-13760-1-git-send-email-plyatov@gmail.com>
On Thu, 2015-08-13 at 16:12 +0300, Igor Plyatov wrote:
> * Due to HW bug, LAN8700 sometimes does not detect presence of energy in the
> Ethernet cable in Energy Detect Power-Down mode (e.g while EDPWRDOWN bit is
> set, the ENERGYON bit does not asserted sometimes). This is a common bug of
> LAN87xx family of PHY chips.
> * The lan87xx_read_status() was improved to acquire ENERGYON bit. Its previous
> algorythm still not reliable on 100 % and sometimes skip cable plugging.
[]
> diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
[]
> @@ -104,10 +104,12 @@ static int lan911x_config_init(struct phy_device *phydev)
> static int lan87xx_read_status(struct phy_device *phydev)
> {
> int err = genphy_read_status(phydev);
> + int rc;
Is there a reason to move this declaration?
> + int i;
>
> if (!phydev->link) {
> /* Disable EDPD to wake up PHY */
> - int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
> + rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
> if (rc < 0)
> return rc;
>
next prev parent reply other threads:[~2015-08-13 16:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-13 13:12 [PATCH] net: phy: workaround for buggy cable detection by LAN8700 after cable plugging Igor Plyatov
2015-08-13 16:50 ` Joe Perches [this message]
2015-08-13 17:11 ` Igor Plyatov
2015-08-13 17:15 ` Joe Perches
2015-08-13 18:37 ` David Miller
2015-08-13 19:23 ` Igor Plyatov
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