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>

diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index b378b34..8bb21b6 100644 (file)
--- 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;
 }