Add a dummy read to ensure triggering mdio controller before starting polling the status of mdio controller. Signed-off-by: Jacky Chou <jacky_chou@xxxxxxxxxxxxxx> --- drivers/net/mdio/mdio-aspeed.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c index 4d5a115baf85..feae30bc3e78 100644 --- a/drivers/net/mdio/mdio-aspeed.c +++ b/drivers/net/mdio/mdio-aspeed.c @@ -62,6 +62,8 @@ static int aspeed_mdio_op(struct mii_bus *bus, u8 st, u8 op, u8 phyad, u8 regad, | FIELD_PREP(ASPEED_MDIO_DATA_MIIRDATA, data); iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL); + /* Add dummy read to ensure triggering mdio controller */ + (void)ioread32(ctx->base + ASPEED_MDIO_CTRL); return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, !(ctrl & ASPEED_MDIO_CTRL_FIRE), -- 2.25.1
