Re: [PATCH v2] mdio: aspeed: Fix "Link is Down" issue
From: Andrew Jeffery <hidden>
Date: 2021-11-25 03:15:02
On Thu, 25 Nov 2021, at 13:14, Dylan Hung wrote:
The issue happened randomly in runtime. The message "Link is Down" is
popped but soon it recovered to "Link is Up".
The "Link is Down" results from the incorrect read data for reading the
PHY register via MDIO bus. The correct sequence for reading the data
shall be:
1. fire the command
2. wait for command done (this step was missing)
3. wait for data idle
4. read data from data register
Fixes: f160e99462c6 ("net: phy: Add mdio-aspeed")
Cc: stable@vger.kernel.org
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Dylan Hung <redacted>Acked-by: Andrew Jeffery <redacted> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel