sh_eth: get Ether port # only when needed

The dual-port Ether configurations always have a shared TSU to e.g. pass
the packets between those  ports.  With the  TSU init. code gathered under
the single *if*, we now can only get the port # from 'platform_device::id'
only when we actually  need it  (and not recalculate it each time)...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 8 deletions

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 14d5373ddc6b..a0fe05968348 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -3125,7 +3125,7 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
         const struct platform_device_id *id = platform_get_device_id(pdev);
         struct sh_eth_private *mdp;
         struct net_device *ndev;
-        int ret, devno;
+        int ret;
 
         /* get base addr */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -3137,10 +3137,6 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
         pm_runtime_enable(&pdev->dev);
         pm_runtime_get_sync(&pdev->dev);
 
-        devno = pdev->id;
-        if (devno < 0)
-                devno = 0;
-
         ret = platform_get_irq(pdev, 0);
         if (ret < 0)
                 goto out_release;
@@ -3223,6 +3219,7 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
         }
 
         if (mdp->cd->tsu) {
+                int port = pdev->id < 0 ? 0 : pdev->id % 2;
                 struct resource *rtsu;
 
                 rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
@@ -3234,7 +3231,7 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
                 /* We can only request the  TSU region  for the first port
                  * of the two  sharing this TSU for the probe to succeed...
                  */
-                if (devno % 2 == 0 &&
+                if (port == 0 &&
                     !devm_request_mem_region(&pdev->dev, rtsu->start,
                                              resource_size(rtsu),
                                              dev_name(&pdev->dev))) {
@@ -3250,11 +3247,11 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
                         ret = -ENOMEM;
                         goto out_release;
                 }
-                mdp->port = devno % 2;
+                mdp->port = port;
                 ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER;
 
                 /* Need to init only the first port of the two sharing a TSU */
-                if (devno % 2 == 0) {
+                if (port == 0) {
                         if (mdp->cd->chip_reset)
                                 mdp->cd->chip_reset(ndev);