staging: line6: drop pod prog_data buffers

The driver no longer keeps state of MIDI-accessible device parameters.
Drop the buffers but be careful to keep the device startup procedure
working even though we no longer store the contents of the dump request.
The startup procedure will be simplified in a later patch.

Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/line6/pod.c

@@ -131,14 +131,6 @@ static char *pod_alloc_sysex_buffer(struct usb_line6_pod *pod, int code,
 					size);
 }
 
-/*
-	Store parameter value in driver memory.
-*/
-static void pod_store_parameter(struct usb_line6_pod *pod, int param, int value)
-{
-	pod->prog_data.control[param] = value;
-}
-
 /*
 	Handle SAVE button.
 */
@@ -169,9 +161,6 @@ void line6_pod_process_message(struct usb_line6_pod *pod)
 	/* process all remaining messages */
 	switch (buf[0]) {
 	case LINE6_PARAM_CHANGE | LINE6_CHANNEL_DEVICE:
-		pod_store_parameter(pod, buf[1], buf[2]);
-		/* intentionally no break here! */
-
 	case LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST:
 		break;
 
@@ -187,36 +176,8 @@ void line6_pod_process_message(struct usb_line6_pod *pod)
 		if (memcmp(buf + 1, line6_midi_id, sizeof(line6_midi_id)) == 0) {
 			switch (buf[5]) {
 			case POD_SYSEX_DUMP:
-				if (pod->line6.message_length ==
-				    sizeof(pod->prog_data) + 7) {
-					switch (pod->dumpreq.in_progress) {
-					case LINE6_DUMP_CURRENT:
-						memcpy(&pod->prog_data, buf + 7,
-						       sizeof(pod->prog_data));
-						break;
-
-					case POD_DUMP_MEMORY:
-						memcpy(&pod->prog_data_buf,
-						       buf + 7,
-						       sizeof
-						       (pod->prog_data_buf));
-						break;
-
-					default:
-						dev_dbg(pod->line6.ifcdev,
-							"unknown dump code %02X\n",
-							pod->dumpreq.in_progress);
-					}
-
-					line6_dump_finished(&pod->dumpreq);
-					pod_startup3(pod);
-				} else
-					dev_dbg(pod->line6.ifcdev,
-						"wrong size of channel dump message (%d instead of %d)\n",
-						pod->line6.message_length,
-						(int)sizeof(pod->prog_data) +
-						7);
-
+				line6_dump_finished(&pod->dumpreq);
+				pod_startup3(pod);
 				break;
 
 			case POD_SYSEX_SYSTEM:{
@@ -279,8 +240,7 @@ void line6_pod_process_message(struct usb_line6_pod *pod)
 void line6_pod_transmit_parameter(struct usb_line6_pod *pod, int param,
 				  u8 value)
 {
-	if (line6_transmit_parameter(&pod->line6, param, value) == 0)
-		pod_store_parameter(pod, param, value);
+	line6_transmit_parameter(&pod->line6, param, value);
 }
 
 /*

drivers/staging/line6/pod.h

@@ -52,21 +52,6 @@ enum {
 	POD_STARTUP_LAST = POD_STARTUP_SETUP - 1
 };
 
-/**
-	Binary PODxt Pro program dump
-*/
-struct pod_program {
-	/**
-		Header information (including program name).
-	*/
-	unsigned char header[0x20];
-
-	/**
-		Program parameters.
-	*/
-	unsigned char control[POD_CONTROL_SIZE];
-};
-
 struct usb_line6_pod {
 	/**
 		Generic Line6 USB data.
@@ -78,16 +63,6 @@ struct usb_line6_pod {
 	*/
 	struct line6_dump_request dumpreq;
 
-	/**
-		Current program settings.
-	*/
-	struct pod_program prog_data;
-
-	/**
-		Buffer for data retrieved from or to be stored on PODxt Pro.
-	*/
-	struct pod_program prog_data_buf;
-
 	/**
 		Instrument monitor level.
 	*/