[media] radio-shark2: Only compile led support when CONFIG_LED_CLASS is set

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/radio/radio-shark2.c b/drivers/media/radio/radio-shark2.c
index 217483c..7b4efdf 100644 (file)
--- a/drivers/media/radio/radio-shark2.c
+++ b/drivers/media/radio/radio-shark2.c
@@ -35,6 +35,11 @@
 #include <media/v4l2-device.h>
 #include "radio-tea5777.h"
 
+#if defined(CONFIG_LEDS_CLASS) || \
+    (defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK2_MODULE))
+#define SHARK_USE_LEDS 1
+#endif
+
 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 MODULE_DESCRIPTION("Griffin radioSHARK2, USB radio receiver driver");
 MODULE_LICENSE("GPL");
@@ -43,7 +48,6 @@ static int debug;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
-
 #define SHARK_IN_EP            0x83
 #define SHARK_OUT_EP           0x05
 
@@ -54,36 +58,18 @@ MODULE_PARM_DESC(debug, "Debug level (0-1)");
 
 enum { BLUE_LED, RED_LED, NO_LEDS };
 
-static void shark_led_set_blue(struct led_classdev *led_cdev,
-                              enum led_brightness value);
-static void shark_led_set_red(struct led_classdev *led_cdev,
-                             enum led_brightness value);
-
-static const struct led_classdev shark_led_templates[NO_LEDS] = {
-       [BLUE_LED] = {
-               .name           = "%s:blue:",
-               .brightness     = LED_OFF,
-               .max_brightness = 127,
-               .brightness_set = shark_led_set_blue,
-       },
-       [RED_LED] = {
-               .name           = "%s:red:",
-               .brightness     = LED_OFF,
-               .max_brightness = 1,
-               .brightness_set = shark_led_set_red,
-       },
-};
-
 struct shark_device {
        struct usb_device *usbdev;
        struct v4l2_device v4l2_dev;
        struct radio_tea5777 tea;
 
+#ifdef SHARK_USE_LEDS
        struct work_struct led_work;
        struct led_classdev leds[NO_LEDS];
        char led_names[NO_LEDS][32];
        atomic_t brightness[NO_LEDS];
        unsigned long brightness_new;
+#endif
 
        u8 *transfer_buffer;
 };
@@ -161,6 +147,7 @@ static struct radio_tea5777_ops shark_tea_ops = {
        .read_reg  = shark_read_reg,
 };
 
+#ifdef SHARK_USE_LEDS
 static void shark_led_work(struct work_struct *work)
 {
        struct shark_device *shark =
@@ -208,21 +195,72 @@ static void shark_led_set_red(struct led_classdev *led_cdev,
        schedule_work(&shark->led_work);
 }
 
+static const struct led_classdev shark_led_templates[NO_LEDS] = {
+       [BLUE_LED] = {
+               .name           = "%s:blue:",
+               .brightness     = LED_OFF,
+               .max_brightness = 127,
+               .brightness_set = shark_led_set_blue,
+       },
+       [RED_LED] = {
+               .name           = "%s:red:",
+               .brightness     = LED_OFF,
+               .max_brightness = 1,
+               .brightness_set = shark_led_set_red,
+       },
+};
+
+static int shark_register_leds(struct shark_device *shark, struct device *dev)
+{
+       int i, retval;
+
+       INIT_WORK(&shark->led_work, shark_led_work);
+       for (i = 0; i < NO_LEDS; i++) {
+               shark->leds[i] = shark_led_templates[i];
+               snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
+                        shark->leds[i].name, shark->v4l2_dev.name);
+               shark->leds[i].name = shark->led_names[i];
+               retval = led_classdev_register(dev, &shark->leds[i]);
+               if (retval) {
+                       v4l2_err(&shark->v4l2_dev,
+                                "couldn't register led: %s\n",
+                                shark->led_names[i]);
+                       return retval;
+               }
+       }
+       return 0;
+}
+
+static void shark_unregister_leds(struct shark_device *shark)
+{
+       int i;
+
+       for (i = 0; i < NO_LEDS; i++)
+               led_classdev_unregister(&shark->leds[i]);
+
+       cancel_work_sync(&shark->led_work);
+}
+#else
+static int shark_register_leds(struct shark_device *shark, struct device *dev)
+{
+       v4l2_warn(&shark->v4l2_dev,
+                 "CONFIG_LED_CLASS not enabled, LED support disabled\n");
+       return 0;
+}
+static inline void shark_unregister_leds(struct shark_device *shark) { }
+#endif
+
 static void usb_shark_disconnect(struct usb_interface *intf)
 {
        struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
        struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
-       int i;
 
        mutex_lock(&shark->tea.mutex);
        v4l2_device_disconnect(&shark->v4l2_dev);
        radio_tea5777_exit(&shark->tea);
        mutex_unlock(&shark->tea.mutex);
 
-       for (i = 0; i < NO_LEDS; i++)
-               led_classdev_unregister(&shark->leds[i]);
-
-       cancel_work_sync(&shark->led_work);
+       shark_unregister_leds(shark);
 
        v4l2_device_put(&shark->v4l2_dev);
 }
@@ -240,7 +278,7 @@ static int usb_shark_probe(struct usb_interface *intf,
                           const struct usb_device_id *id)
 {
        struct shark_device *shark;
-       int i, retval = -ENOMEM;
+       int retval = -ENOMEM;
 
        shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
        if (!shark)
@@ -250,8 +288,13 @@ static int usb_shark_probe(struct usb_interface *intf,
        if (!shark->transfer_buffer)
                goto err_alloc_buffer;
 
-       shark->v4l2_dev.release = usb_shark_release;
        v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);
+
+       retval = shark_register_leds(shark, &intf->dev);
+       if (retval)
+               goto err_reg_leds;
+
+       shark->v4l2_dev.release = usb_shark_release;
        retval = v4l2_device_register(&intf->dev, &shark->v4l2_dev);
        if (retval) {
                v4l2_err(&shark->v4l2_dev, "couldn't register v4l2_device\n");
@@ -275,32 +318,13 @@ static int usb_shark_probe(struct usb_interface *intf,
                goto err_init_tea;
        }
 
-       INIT_WORK(&shark->led_work, shark_led_work);
-       for (i = 0; i < NO_LEDS; i++) {
-               shark->leds[i] = shark_led_templates[i];
-               snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
-                        shark->leds[i].name, shark->v4l2_dev.name);
-               shark->leds[i].name = shark->led_names[i];
-               /*
-                * We don't fail the probe if we fail to register the leds,
-                * because once we've called radio_tea5777_init, the /dev/radio0
-                * node may be opened from userspace holding a reference to us!
-                *
-                * Note we cannot register the leds first instead as
-                * shark_led_work depends on the v4l2 mutex and registered bit.
-                */
-               retval = led_classdev_register(&intf->dev, &shark->leds[i]);
-               if (retval)
-                       v4l2_err(&shark->v4l2_dev,
-                                "couldn't register led: %s\n",
-                                shark->led_names[i]);
-       }
-
        return 0;
 
 err_init_tea:
        v4l2_device_unregister(&shark->v4l2_dev);
 err_reg_dev:
+       shark_unregister_leds(shark);
+err_reg_leds:
        kfree(shark->transfer_buffer);
 err_alloc_buffer:
        kfree(shark);