1 files changed, 34 insertions, 6 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1251_sdio.c b/drivers/net/wireless/wl12xx/wl1251_sdio.c
index c561332e7009..b901b6135654 100644
--- a/drivers/net/wireless/wl12xx/wl1251_sdio.c
+++ b/drivers/net/wireless/wl12xx/wl1251_sdio.c
@@ -37,11 +37,17 @@
 #define SDIO_DEVICE_ID_TI_WL1251        0x9066
 #endif
 
+struct wl1251_sdio {
+        struct sdio_func *func;
+        u32 elp_val;
+};
+
 static struct wl12xx_platform_data *wl12xx_board_data;
 
 static struct sdio_func *wl_to_func(struct wl1251 *wl)
 {
-        return wl->if_priv;
+        struct wl1251_sdio *wl_sdio = wl->if_priv;
+        return wl_sdio->func;
 }
 
 static void wl1251_sdio_interrupt(struct sdio_func *func)
@@ -90,10 +96,17 @@ static void wl1251_sdio_write(struct wl1251 *wl, int addr,
 static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
 {
         int ret = 0;
-        struct sdio_func *func = wl_to_func(wl);
-
+        struct wl1251_sdio *wl_sdio = wl->if_priv;
+        struct sdio_func *func = wl_sdio->func;
+
+        /*
+         * The hardware only supports RAW (read after write) access for
+         * reading, regular sdio_readb won't work here (it interprets
+         * the unused bits of CMD52 as write data even if we send read
+         * request).
+         */
         sdio_claim_host(func);
-        *val = sdio_readb(func, addr, &ret);
+        *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
         sdio_release_host(func);
 
         if (ret)
@@ -103,7 +116,8 @@ static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
 static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
 {
         int ret = 0;
-        struct sdio_func *func = wl_to_func(wl);
+        struct wl1251_sdio *wl_sdio = wl->if_priv;
+        struct sdio_func *func = wl_sdio->func;
 
         sdio_claim_host(func);
         sdio_writeb(func, val, addr, &ret);
@@ -111,6 +125,8 @@ static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
 
         if (ret)
                 wl1251_error("sdio_writeb failed (%d)", ret);
+        else
+                wl_sdio->elp_val = val;
 }
 
 static void wl1251_sdio_reset(struct wl1251 *wl)
@@ -197,6 +213,7 @@ static int wl1251_sdio_probe(struct sdio_func *func,
         int ret;
         struct wl1251 *wl;
         struct ieee80211_hw *hw;
+        struct wl1251_sdio *wl_sdio;
 
         hw = wl1251_alloc_hw();
         if (IS_ERR(hw))
@@ -204,6 +221,12 @@ static int wl1251_sdio_probe(struct sdio_func *func,
 
         wl = hw->priv;
 
+        wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
+        if (wl_sdio == NULL) {
+                ret = -ENOMEM;
+                goto out_free_hw;
+        }
+
         sdio_claim_host(func);
         ret = sdio_enable_func(func);
         if (ret)
@@ -213,7 +236,8 @@ static int wl1251_sdio_probe(struct sdio_func *func,
         sdio_release_host(func);
 
         SET_IEEE80211_DEV(hw, &func->dev);
-        wl->if_priv = func;
+        wl_sdio->func = func;
+        wl->if_priv = wl_sdio;
         wl->if_ops = &wl1251_sdio_ops;
         wl->set_power = wl1251_sdio_set_power;
 
@@ -259,6 +283,8 @@ disable:
         sdio_disable_func(func);
 release:
         sdio_release_host(func);
+        kfree(wl_sdio);
+out_free_hw:
         wl1251_free_hw(wl);
         return ret;
 }
@@ -266,9 +292,11 @@ release:
 static void __devexit wl1251_sdio_remove(struct sdio_func *func)
 {
         struct wl1251 *wl = sdio_get_drvdata(func);
+        struct wl1251_sdio *wl_sdio = wl->if_priv;
 
         if (wl->irq)
                 free_irq(wl->irq, wl);
+        kfree(wl_sdio);
         wl1251_free_hw(wl);
 
         sdio_claim_host(func);