Input: iforce - reformat the packet dump output

Previously, packets that have been dumped are shown in the
kernel log like this:

drivers/input/joystick/iforce/iforce-packets.c: info cmd = ff04, data =
56
02
04
00

Use dev_dbg to dump the packages only when requested and to list
the parent device as well. Use printf logic to generate the hexdump
instead of looping through every char that needs to be printed (which
in turn fixes the unnecessary newlines and looks more clean in general).

The resulting package dump output does now look like this:

usb 2-8: iforce_dump_packet info cmd = ff04, data = 56 02 04 00
Signed-off-by: Tim Schumacher <timschumi@gmx.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/iforce/iforce-ff.c

@@ -52,7 +52,7 @@ static int make_magnitude_modifier(struct iforce* iforce,
 
 	iforce_send_packet(iforce, FF_CMD_MAGNITUDE, data);
 
-	iforce_dump_packet("magnitude: ", FF_CMD_MAGNITUDE, data);
+	iforce_dump_packet(iforce, "magnitude", FF_CMD_MAGNITUDE, data);
 	return 0;
 }
 
@@ -174,7 +174,7 @@ static int make_condition_modifier(struct iforce* iforce,
 	data[9] = (100 * lsat) >> 16;
 
 	iforce_send_packet(iforce, FF_CMD_CONDITION, data);
-	iforce_dump_packet("condition", FF_CMD_CONDITION, data);
+	iforce_dump_packet(iforce, "condition", FF_CMD_CONDITION, data);
 
 	return 0;
 }

drivers/input/joystick/iforce/iforce-main.c

@@ -356,7 +356,7 @@ int iforce_init_device(struct iforce *iforce)
 
 	for (i = 0; c[i]; i++)
 		if (!iforce_get_id_packet(iforce, c + i))
-			iforce_dump_packet("info", iforce->ecmd, iforce->edata);
+			iforce_dump_packet(iforce, "info", iforce->ecmd, iforce->edata);
 
 /*
  * Disable spring, enable force feedback.

drivers/input/joystick/iforce/iforce-packets.c

@@ -29,14 +29,10 @@ static struct {
 } iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
 
 
-void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data)
+void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data)
 {
-	int i;
-
-	printk(KERN_DEBUG __FILE__ ": %s cmd = %04x, data = ", msg, cmd);
-	for (i = 0; i < LO(cmd); i++)
-		printk("%02x ", data[i]);
-	printk("\n");
+	dev_dbg(iforce->dev->dev.parent, "%s %s cmd = %04x, data = %*ph\n",
+		__func__, msg, cmd, LO(cmd), data);
 }
 
 /*

drivers/input/joystick/iforce/iforce.h

@@ -154,7 +154,7 @@ int iforce_init_device(struct iforce *iforce);
 int iforce_control_playback(struct iforce*, u16 id, unsigned int);
 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data);
 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
-void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ;
+void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data);
 int iforce_get_id_packet(struct iforce *iforce, char *packet);
 
 /* iforce-ff.c */