kernel: sfp: add two fixes submitted to upstream

Add two small fixes for SFP that were submitted upstream.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

target/linux/generic/pending-4.19/754-net-sfp-fix-unbind.patch

@@ -0,0 +1,28 @@
+From 729fd05aac22cdf1e502fbf1bf80e5ebba0d9fbc Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Tue, 3 Dec 2019 17:48:28 +0000
+Subject: [PATCH] net: sfp: fix unbind
+
+When unbinding, we don't correctly tear down the module state, leaving
+(for example) the hwmon registration behind. Ensure everything is
+properly removed by sending a remove event at unbind.
+
+Fixes: 6b0da5c9c1a3 ("net: sfp: track upstream's attachment state in state machine")
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/sfp.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -2242,6 +2242,10 @@ static int sfp_remove(struct platform_de
+ 
+ 	sfp_unregister_socket(sfp->sfp_bus);
+ 
++	rtnl_lock();
++	sfp_sm_event(sfp, SFP_E_REMOVE);
++	rtnl_unlock();
++
+ 	return 0;
+ }
+ 

target/linux/generic/pending-4.19/755-net-sfp-fix-hwmon.patch

@@ -0,0 +1,44 @@
+From 5eb0df5023c6ae8a71a7848fd5e1f788d86e51ae Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Tue, 3 Dec 2019 18:46:04 +0000
+Subject: [PATCH] net: sfp: fix hwmon
+
+The referenced commit below allowed more than one hwmon device to be
+created per SFP, which is definitely not what we want. Avoid this by
+only creating the hwmon device just as we transition to WAITDEV state.
+
+Fixes: 139d3a212a1f ("net: sfp: allow modules with slow diagnostics to probe")
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/sfp.c | 13 ++++---------
+ 1 file changed, 4 insertions(+), 9 deletions(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -1714,6 +1714,10 @@ static void sfp_sm_module(struct sfp *sf
+ 			break;
+ 		}
+ 
++		err = sfp_hwmon_insert(sfp);
++		if (err)
++			dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
++
+ 		sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
+ 		/* fall through */
+ 	case SFP_MOD_WAITDEV:
+@@ -1763,15 +1767,6 @@ static void sfp_sm_module(struct sfp *sf
+ 	case SFP_MOD_ERROR:
+ 		break;
+ 	}
+-
+-#if IS_ENABLED(CONFIG_HWMON)
+-	if (sfp->sm_mod_state >= SFP_MOD_WAITDEV &&
+-	    IS_ERR_OR_NULL(sfp->hwmon_dev)) {
+-		err = sfp_hwmon_insert(sfp);
+-		if (err)
+-			dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
+-	}
+-#endif
+ }
+ 
+ static void sfp_sm_main(struct sfp *sfp, unsigned int event)