[PATCH] net/fsl_pq_mdio: fix handling of TBIPA register

[Lutz Jaenicke]

The TBIPA register is part of gianfar's full register set. When starting
from the MII registers, the start address of struct gfar needs to
be determined via container_of().
Experienced with mpc8313 and "fsl,gianfar-mdio" device tree entries.

Signed-off-by: Lutz Jaenicke <ljaenicke at innominate.com>
---
 drivers/net/ethernet/freescale/fsl_pq_mdio.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fsl_pq_mdio.c b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
index c93a056..9485fdb 100644
--- a/drivers/net/ethernet/freescale/fsl_pq_mdio.c
+++ b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
@@ -193,7 +193,8 @@ static int fsl_pq_mdio_reset(struct mii_bus *bus)
  */
 static uint32_t __iomem *get_gfar_tbipa(void __iomem *p)
 {
-	struct gfar __iomem *enet_regs = p;
+	struct gfar __iomem *enet_regs = 
+		container_of(p, struct gfar, gfar_mii_regs);
 
 	return &enet_regs->tbipa;
 }
-- 
1.7.10.4