From 5ed0bd49b2d3ac4439c2d7f44e5a82b7cf6f409a Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Fri, 18 Oct 2019 10:09:02 +0100
Subject: [PATCH 626/660] net: sfp: split the PHY probe from sfp_sm_mod_init()
Move the PHY probe into a separate function, splitting it from
sfp_sm_mod_init(). This will allow us to eliminate the 50ms mdelay()
inside the state machine.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
drivers/net/phy/sfp.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -1353,14 +1353,10 @@ static void sfp_sm_fault(struct sfp *sfp
static void sfp_sm_mod_init(struct sfp *sfp)
{
sfp_module_tx_enable(sfp);
+}
- /* Wait t_init before indicating that the link is up, provided the
- * current state indicates no TX_FAULT. If TX_FAULT clears before
- * this time, that's fine too.
- */
- sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES);
- sfp->sm_retries = 5;
-
+static void sfp_sm_probe_for_phy(struct sfp *sfp)
+{
/* Setting the serdes link mode is guesswork: there's no
* field in the EEPROM which indicates what mode should
* be used.
@@ -1645,8 +1641,17 @@ static void sfp_sm_main(struct sfp *sfp,
switch (sfp->sm_state) {
case SFP_S_DOWN:
if (sfp->sm_mod_state == SFP_MOD_PRESENT &&
- sfp->sm_dev_state == SFP_DEV_UP)
+ sfp->sm_dev_state == SFP_DEV_UP) {
sfp_sm_mod_init(sfp);
+ sfp_sm_probe_for_phy(sfp);
+
+ /* Wait t_init before indicating that the link is up,
+ * provided the current state indicates no TX_FAULT. If
+ * TX_FAULT clears before this time, that's fine too.
+ */
+ sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES);
+ sfp->sm_retries = 5;
+ }
break;
case SFP_S_INIT: