gianfar: Fix potential oops during OF address translation

gianfar driver may pass NULL pointer to the of_translate_address(),
which may lead to a kernel oops. Fix this by using of_iomap(), which
is also much simpler and shorter.

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

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 080d1ce..df49af3 100644 (file)
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -549,12 +549,8 @@ static int gfar_parse_group(struct device_node *np,
                struct gfar_private *priv, const char *model)
 {
        u32 *queue_mask;
-       u64 addr, size;
-
-       addr = of_translate_address(np,
-                       of_get_address(np, 0, &size, NULL));
-       priv->gfargrp[priv->num_grps].regs = ioremap(addr, size);
 
+       priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0);
        if (!priv->gfargrp[priv->num_grps].regs)
                return -ENOMEM;