wl18xx: alloc conf.phy memory to ensure alignemnt

We get DMA alignment trouble if the beginning of the conf.phy struct is
not aligned to 4 bytes. Use kmemdup to ensure alignment.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index b378b34c4a6a..8bb21b6458b8 100644
--- a/drivers/net/wireless/ti/wl18xx/main.c
+++ b/drivers/net/wireless/ti/wl18xx/main.c
@@ -772,16 +772,24 @@ out:
 static int wl18xx_set_mac_and_phy(struct wl1271 *wl)
 {
         struct wl18xx_priv *priv = wl->priv;
+        struct wl18xx_mac_and_phy_params *params;
         int ret;
 
+        params = kmemdup(&priv->conf.phy, sizeof(*params), GFP_KERNEL);
+        if (!params) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
         ret = wlcore_set_partition(wl, &wl->ptable[PART_PHY_INIT]);
         if (ret < 0)
                 goto out;
 
-        ret = wlcore_write(wl, WL18XX_PHY_INIT_MEM_ADDR, (u8 *)&priv->conf.phy,
-                           sizeof(struct wl18xx_mac_and_phy_params), false);
+        ret = wlcore_write(wl, WL18XX_PHY_INIT_MEM_ADDR, params,
+                           sizeof(*params), false);
 
 out:
+        kfree(params);
         return ret;
 }