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Subject[PATCH 4.14 045/118] sh_eth: fix SH7757 GEther initialization
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

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
@@ -3241,8 +3241,8 @@ 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
@@ -17,7 +17,6 @@ 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

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