fsl_pq_mdio: Fix compiler/sparse warnings (part 1)

commit 1d2397d742b7a2b39b2f09dd9da3b9d1463f55e9 ("fsl_pq_mdio: Add
Suport for etsec2.0 devices") introduced the following warnings:

  CHECK   fsl_pq_mdio.c
fsl_pq_mdio.c:287:22: warning: incorrect type in initializer (different base types)
fsl_pq_mdio.c:287:22:    expected unknown type 11 const *__mptr
fsl_pq_mdio.c:287:22:    got unsigned long long [unsigned] [assigned] [usertype] addr
fsl_pq_mdio.c:287:19: warning: incorrect type in assignment (different base types)
fsl_pq_mdio.c:287:19:    expected unsigned long long [unsigned] [usertype] ioremap_miimcfg
fsl_pq_mdio.c:287:19:    got struct fsl_pq_mdio *<noident>
  CC      fsl_pq_mdio.o
fsl_pq_mdio.c: In function 'fsl_pq_mdio_probe':
fsl_pq_mdio.c:287: warning: initialization makes pointer from integer without a cast
fsl_pq_mdio.c:287: warning: assignment makes integer from pointer without a cast

These warnings are not easy to fix without ugly __force casts. So,
instead of introducing the casts, rework the code to substitute an
offset from an already mapped area. This makes the code a lot simpler
and less duplicated.

Plus, from now on we don't actually map reserved registers on
non-etsec2.0 devices, so we have more chances to catch programming
errors.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 19 deletions

diff --git a/drivers/net/fsl_pq_mdio.c b/drivers/net/fsl_pq_mdio.c
index 4065b7c01ecb..fb8c8d9dcf29 100644
--- a/drivers/net/fsl_pq_mdio.c
+++ b/drivers/net/fsl_pq_mdio.c
@@ -262,10 +262,11 @@ static int fsl_pq_mdio_probe(struct of_device *ofdev,
         struct device_node *np = ofdev->node;
         struct device_node *tbi;
         struct fsl_pq_mdio __iomem *regs = NULL;
+        void __iomem *map;
         u32 __iomem *tbipa;
         struct mii_bus *new_bus;
         int tbiaddr = -1;
-        u64 addr = 0, size = 0, ioremap_miimcfg = 0;
+        u64 addr = 0, size = 0;
         int err = 0;
 
         new_bus = mdiobus_alloc();
@@ -279,28 +280,20 @@ static int fsl_pq_mdio_probe(struct of_device *ofdev,
         fsl_pq_mdio_bus_name(new_bus->id, np);
 
         /* Set the PHY base address */
-        if (of_device_is_compatible(np,"fsl,gianfar-mdio") ||
-                of_device_is_compatible(np, "fsl,gianfar-tbi") ||
-                of_device_is_compatible(np, "fsl,ucc-mdio") ||
-                of_device_is_compatible(np,"ucc_geth_phy" )) {
-                addr = of_translate_address(np, of_get_address(np, 0, &size, NULL));
-                ioremap_miimcfg =  container_of(addr, struct fsl_pq_mdio, miimcfg);
-                regs = ioremap(ioremap_miimcfg, size +
-                                offsetof(struct fsl_pq_mdio, miimcfg));
-        } else if (of_device_is_compatible(np,"fsl,etsec2-mdio") ||
-                        of_device_is_compatible(np, "fsl,etsec2-tbi")) {
-                addr = of_translate_address(np, of_get_address(np, 0, &size, NULL));
-                regs = ioremap(addr, size);
-        } else {
-                err = -EINVAL;
-                goto err_free_bus;
-        }
-
-        if (NULL == regs) {
+        addr = of_translate_address(np, of_get_address(np, 0, &size, NULL));
+        map = ioremap(addr, size);
+        if (!map) {
                 err = -ENOMEM;
                 goto err_free_bus;
         }
 
+        if (of_device_is_compatible(np, "fsl,gianfar-mdio") ||
+                        of_device_is_compatible(np, "fsl,gianfar-tbi") ||
+                        of_device_is_compatible(np, "fsl,ucc-mdio") ||
+                        of_device_is_compatible(np, "ucc_geth_phy"))
+                map -= offsetof(struct fsl_pq_mdio, miimcfg);
+        regs = map;
+
         new_bus->priv = (void __force *)regs;
 
         new_bus->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);