Patch "sh_eth: fix SH7757 GEther initialization" has been added to the 4.4-stable tree

Patch "sh_eth: fix SH7757 GEther initialization" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    sh_eth: fix SH7757 GEther initialization

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sh_eth-fix-sh7757-gether-initialization.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sat Jan 13 14:28:20 CET 2018
From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Date: Thu, 4 Jan 2018 21:06:49 +0300
Subject: sh_eth: fix SH7757 GEther initialization

From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>


[ Upstream commit 5133550296d43236439494aa955bfb765a89f615 ]

Renesas  SH7757 has 2 Fast and 2 Gigabit Ether controllers, while the
'sh_eth' driver can only reset and initialize TSU of the first controller
pair. Shimoda-san tried to solve that adding the 'needs_init' member to the
'struct sh_eth_plat_data', however the platform code still never sets this
flag. I think  that we can infer this information from the 'devno' variable
(set  to 'platform_device::id') and reset/init the Ether controller pair
only for an even 'devno'; therefore 'sh_eth_plat_data::needs_init' can be
removed...

Fixes: 150647fb2c31 ("net: sh_eth: change the condition of initialization")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/renesas/sh_eth.c |    4 ++--
 include/linux/sh_eth.h                |    1 -
 2 files changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -3205,8 +3205,8 @@ static int sh_eth_drv_probe(struct platf
 		ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER;
 	}
 
-	/* initialize first or needed device */
-	if (!devno || pd->needs_init) {
+	/* Need to init only the first port of the two sharing a TSU */
+	if (devno % 2 == 0) {
 		if (mdp->cd->chip_reset)
 			mdp->cd->chip_reset(ndev);
 
--- a/include/linux/sh_eth.h
+++ b/include/linux/sh_eth.h
@@ -16,7 +16,6 @@ struct sh_eth_plat_data {
 	unsigned char mac_addr[ETH_ALEN];
 	unsigned no_ether_link:1;
 	unsigned ether_link_active_low:1;
-	unsigned needs_init:1;
 };
 
 #endif


Patches currently in stable-queue which might be from sergei.shtylyov@cogentembedded.com are

queue-4.4/sh_eth-fix-sh7757-gether-initialization.patch
queue-4.4/sh_eth-fix-tsu-resource-handling.patch