wl1271: propagate set_power's return value

Make it possible for the set power method to indicate a
success/failure return value. This is needed to support
more complex power on/off operations such as SDIO
power manipulations.
Signed-off-by: NOhad Ben-Cohen <ohad@wizery.com>
Acked-by: NLuciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/wl1271.h

@@ -313,7 +313,7 @@ struct wl1271_if_operations {
 		     bool fixed);
 	void (*reset)(struct wl1271 *wl);
 	void (*init)(struct wl1271 *wl);
-	void (*power)(struct wl1271 *wl, bool enable);
+	int (*power)(struct wl1271 *wl, bool enable);
 	struct device* (*dev)(struct wl1271 *wl);
 	void (*enable_irq)(struct wl1271 *wl);
 	void (*disable_irq)(struct wl1271 *wl);

drivers/net/wireless/wl12xx/wl1271_io.h

@@ -144,10 +144,13 @@ static inline void wl1271_power_off(struct wl1271 *wl)
 	clear_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
 }
 
-static inline void wl1271_power_on(struct wl1271 *wl)
+static inline int wl1271_power_on(struct wl1271 *wl)
 {
-	wl->if_ops->power(wl, true);
-	set_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
+	int ret = wl->if_ops->power(wl, true);
+	if (ret == 0)
+		set_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
+
+	return ret;
 }
 
 

drivers/net/wireless/wl12xx/wl1271_main.c

@@ -621,7 +621,9 @@ static int wl1271_chip_wakeup(struct wl1271 *wl)
 	int ret = 0;
 
 	msleep(WL1271_PRE_POWER_ON_SLEEP);
-	wl1271_power_on(wl);
+	ret = wl1271_power_on(wl);
+	if (ret < 0)
+		goto out;
 	msleep(WL1271_POWER_ON_SLEEP);
 	wl1271_io_reset(wl);
 	wl1271_io_init(wl);

drivers/net/wireless/wl12xx/wl1271_sdio.c

@@ -159,35 +159,38 @@ static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 		wl1271_error("sdio write failed (%d)", ret);
 }
 
-static void wl1271_sdio_power_on(struct wl1271 *wl)
+static int wl1271_sdio_power_on(struct wl1271 *wl)
 {
 	struct sdio_func *func = wl_to_func(wl);
 
 	sdio_claim_host(func);
 	sdio_enable_func(func);
 	sdio_release_host(func);
+
+	return 0;
 }
 
-static void wl1271_sdio_power_off(struct wl1271 *wl)
+static int wl1271_sdio_power_off(struct wl1271 *wl)
 {
 	struct sdio_func *func = wl_to_func(wl);
 
 	sdio_claim_host(func);
 	sdio_disable_func(func);
 	sdio_release_host(func);
+
+	return 0;
 }
 
-static void wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
+static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 {
 	/* Let the SDIO stack handle wlan_enable control, so we
 	 * keep host claimed while wlan is in use to keep wl1271
 	 * alive.
 	 */
 	if (enable)
-		wl1271_sdio_power_on(wl);
+		return wl1271_sdio_power_on(wl);
 	else
-		wl1271_sdio_power_off(wl);
-
+		return wl1271_sdio_power_off(wl);
 }
 
 static struct wl1271_if_operations sdio_ops = {

drivers/net/wireless/wl12xx/wl1271_spi.c

@@ -312,10 +312,12 @@ static irqreturn_t wl1271_irq(int irq, void *cookie)
 	return IRQ_HANDLED;
 }
 
-static void wl1271_spi_set_power(struct wl1271 *wl, bool enable)
+static int wl1271_spi_set_power(struct wl1271 *wl, bool enable)
 {
 	if (wl->set_power)
 		wl->set_power(enable);
+
+	return 0;
 }
 
 static struct wl1271_if_operations spi_ops = {