[PATCH net-next] net: phy: aquantia: Poll global status register for provision ID

After the firmware reset sequence completes, the global reserved status
register (VEND1_GLOBAL_RSVD_STAT1) may not yet contain a valid provision
ID. This can cause subsequent firmware operations to proceed with stale
state.

Poll VEND1_GLOBAL_RSVD_STAT1 until the provision ID field is non-zero
before returning from aqr_wait_reset_complete(). A timeout is treated as
a non-fatal warning since the PHY can still function without a valid
provision ID.

Co-developed-by: Sagar Cheluvegowda <redacted>
Signed-off-by: Sagar Cheluvegowda <redacted>
Signed-off-by: Hongmei Xu <redacted>
---
 drivers/net/phy/aquantia/aquantia_main.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/aquantia/aquantia_main.c b/drivers/net/phy/aquantia/aquantia_main.c
index e95d391a6dc2..1d8429a9abbc 100644
--- a/drivers/net/phy/aquantia/aquantia_main.c
+++ b/drivers/net/phy/aquantia/aquantia_main.c

@@ -702,7 +702,22 @@ int aqr_wait_reset_complete(struct phy_device *phydev)
 		return val;
 	}
 
-	return ret;
+	if (ret)
+		return ret;
+
+	ret = read_poll_timeout(phy_read_mmd, val,
+				val < 0 ||
+				FIELD_GET(VEND1_GLOBAL_RSVD_STAT1_PROV_ID, val),
+				AQR_FW_WAIT_SLEEP_US, AQR_FW_WAIT_TIMEOUT_US,
+				false, phydev, MDIO_MMD_VEND1,
+				VEND1_GLOBAL_RSVD_STAT1);
+	if (val < 0)
+		phydev_warn(phydev, "Failed to read VEND1_GLOBAL_RSVD_STAT1: %pe\n",
+			    ERR_PTR(val));
+	else if (ret)
+		phydev_warn(phydev, "Provision ID not ready\n");
+
+	return 0;
 }
 
 static int aqr_build_fingerprint(struct phy_device *phydev)

---
base-commit: 944ae66642b726bd6b25ae71b1e9ff88a0e0bdb0
change-id: 20260923-aquantia-poll-global-status-register-d8966a46e56d

Best regards,
--  
Hongmei Xu [off-list ref]