staging: line6: Call *_disconnect() via pointer

Which *_disconnect() to call on disconnect is known at initialization.
Add a function pointer to the `usb_line6' struct and use to call into
the appropriate logic instead of evaluating the conditional logic.

Signed-off-by: Chris Rorvick <chris@rorvick.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

6 files changed, 8 insertions, 42 deletions

diff --git a/drivers/staging/line6/driver.c b/drivers/staging/line6/driver.c
index f7629cbe01a3..fc852f6ab8bc 100644
--- a/drivers/staging/line6/driver.c
+++ b/drivers/staging/line6/driver.c
@@ -1017,48 +1017,7 @@ static void line6_disconnect(struct usb_interface *interface)
                         dev_err(line6->ifcdev,
                                 "driver bug: inconsistent usb device\n");
 
-                switch (line6->type) {
-                case LINE6_BASSPODXT:
-                case LINE6_BASSPODXTLIVE:
-                case LINE6_BASSPODXTPRO:
-                case LINE6_POCKETPOD:
-                case LINE6_PODXT:
-                case LINE6_PODXTPRO:
-                        line6_pod_disconnect(interface);
-                        break;
-
-                case LINE6_PODHD300:
-                case LINE6_PODHD400:
-                case LINE6_PODHD500_0:
-                case LINE6_PODHD500_1:
-                        line6_podhd_disconnect(interface);
-                        break;
-
-                case LINE6_PODXTLIVE_POD:
-                        line6_pod_disconnect(interface);
-                        break;
-
-                case LINE6_PODXTLIVE_VARIAX:
-                        line6_variax_disconnect(interface);
-                        break;
-
-                case LINE6_VARIAX:
-                        line6_variax_disconnect(interface);
-                        break;
-
-                case LINE6_PODSTUDIO_GX:
-                case LINE6_PODSTUDIO_UX1:
-                case LINE6_PODSTUDIO_UX2:
-                case LINE6_TONEPORT_GX:
-                case LINE6_TONEPORT_UX1:
-                case LINE6_TONEPORT_UX2:
-                case LINE6_GUITARPORT:
-                        line6_toneport_disconnect(interface);
-                        break;
-
-                default:
-                        MISSING_CASE;
-                }
+                line6->disconnect(interface);
 
                 dev_info(&interface->dev, "Line6 %s now disconnected\n",
                          line6->properties->name);
diff --git a/drivers/staging/line6/driver.h b/drivers/staging/line6/driver.h
index 220813f1cbb9..ad203f197e80 100644
--- a/drivers/staging/line6/driver.h
+++ b/drivers/staging/line6/driver.h
@@ -196,6 +196,7 @@ struct usb_line6 {
         int message_length;
 
         void (*process_message)(struct usb_line6 *);
+        void (*disconnect)(struct usb_interface *);
 };
 
 extern char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1,
diff --git a/drivers/staging/line6/pod.c b/drivers/staging/line6/pod.c
index 79dcff4ae5a7..b9af5cf50ecf 100644
--- a/drivers/staging/line6/pod.c
+++ b/drivers/staging/line6/pod.c
@@ -360,6 +360,7 @@ static int pod_try_init(struct usb_interface *interface,
         struct usb_line6_pod *pod = (struct usb_line6_pod *) line6;
 
         line6->process_message = line6_pod_process_message;
+        line6->disconnect = line6_pod_disconnect;
 
         init_timer(&pod->startup_timer);
         INIT_WORK(&pod->startup_work, pod_startup4);
diff --git a/drivers/staging/line6/podhd.c b/drivers/staging/line6/podhd.c
index 3bb942e7ff93..a57fbce3503e 100644
--- a/drivers/staging/line6/podhd.c
+++ b/drivers/staging/line6/podhd.c
@@ -98,6 +98,8 @@ static int podhd_try_init(struct usb_interface *interface,
         if ((interface == NULL) || (podhd == NULL))
                 return -ENODEV;
 
+        line6->disconnect = line6_podhd_disconnect;
+
         /* initialize audio system: */
         err = line6_init_audio(line6);
         if (err < 0)
diff --git a/drivers/staging/line6/toneport.c b/drivers/staging/line6/toneport.c
index de91910a102c..5c462b72a850 100644
--- a/drivers/staging/line6/toneport.c
+++ b/drivers/staging/line6/toneport.c
@@ -347,6 +347,8 @@ static int toneport_try_init(struct usb_interface *interface,
         if ((interface == NULL) || (toneport == NULL))
                 return -ENODEV;
 
+        line6->disconnect = line6_toneport_disconnect;
+
         /* initialize audio system: */
         err = line6_init_audio(line6);
         if (err < 0)
diff --git a/drivers/staging/line6/variax.c b/drivers/staging/line6/variax.c
index ccb1f689e335..ca25b41ea88b 100644
--- a/drivers/staging/line6/variax.c
+++ b/drivers/staging/line6/variax.c
@@ -181,6 +181,7 @@ static int variax_try_init(struct usb_interface *interface,
         int err;
 
         line6->process_message = line6_variax_process_message;
+        line6->disconnect = line6_variax_disconnect;
 
         init_timer(&variax->startup_timer1);
         init_timer(&variax->startup_timer2);