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);