[net-next 3/3] net: mdio: aspeed: Add dummy read for fire control
From: Jacky Chou
Date: Mon Nov 18 2024 - 05:49:30 EST
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