From: Alex Marginean Date: Thu, 14 Nov 2019 16:58:47 +0000 (+0200) Subject: drivers: net: fsl_enetc_mdio: return with time-out if HW is stuck X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-favicon.png?a=commitdiff_plain;h=6c9644685940e1d98c2d38fb205e8da14f3690b5;p=u-boot.git drivers: net: fsl_enetc_mdio: return with time-out if HW is stuck On some boards MDIO may get stuck if it detects echo on the line. This is a know hardware issue, there is a board fix for it. In case we're running on a board that doesn't have the fix, we don't want to loop here forever and freeze U-Boot. Signed-off-by: Alex Marginean Acked-by: Joe Hershberger --- diff --git a/drivers/net/fsl_enetc_mdio.c b/drivers/net/fsl_enetc_mdio.c index b4463a58a5..47257a6cf6 100644 --- a/drivers/net/fsl_enetc_mdio.c +++ b/drivers/net/fsl_enetc_mdio.c @@ -17,8 +17,13 @@ static void enetc_mdio_wait_bsy(struct enetc_mdio_priv *priv) { - while (enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) + int to = 10000; + + while ((enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) && + --to) cpu_relax(); + if (!to) + printf("T"); } int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,