[PATCH v2] us122l: add snd_us122l_free()

[Karsten Wiese <fzu@wemgehoertderstaat.de>]

Use it to clean up snd_us122l_card_used[].

Without patch unplugging of an US122L soundcard didn't reset the
corresponding element of snd_us122l_card_used[] to 0.
The (SNDRV_CARDS + 1)th plugging in did not result in creating the soundcard
device anymore.
Index values supplied with the modprobe command line were not used correctly
anymore after the first unplugging of an US122L.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Cc: stable@kernel.org
---
 sound/usb/usx2y/us122l.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

Hi Takashi,

this is Version 2 of the patch with a better changelog. Good enough?

Thanks,
Karsten

diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index 012ff1f..e0385ce 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
+ * Copyright (C) 2007-2009 Karsten Wiese <fzu@wemgehoertderstaat.de>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -26,7 +26,7 @@
 #include "us122l.h"
 
 MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
-MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
+MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.6");
 MODULE_LICENSE("GPL");
 
 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-max */
@@ -474,6 +474,14 @@ static bool us122l_create_card(struct snd_card *card)
 	return true;
 }
 
+static void snd_us122l_free(struct snd_card *card)
+{
+	struct us122l	*us122l = US122L(card);
+	int		index = us122l->chip.index;
+	if (index >= 0  &&  index < SNDRV_CARDS)
+		snd_us122l_card_used[index] = 0;
+}
+
 static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
 {
 	int		dev;
@@ -490,7 +498,7 @@ static int usx2y_create_card(struct usb_device *device, struct snd_card **cardp)
 	if (err < 0)
 		return err;
 	snd_us122l_card_used[US122L(card)->chip.index = dev] = 1;
-
+	card->private_free = snd_us122l_free;
 	US122L(card)->chip.dev = device;
 	US122L(card)->chip.card = card;
 	mutex_init(&US122L(card)->mutex);
@@ -584,7 +592,7 @@ static void snd_us122l_disconnect(struct usb_interface *intf)
 	}
 
 	usb_put_intf(intf);
-	usb_put_dev(US122L(card)->chip.dev);
+	usb_put_dev(us122l->chip.dev);
 
 	while (atomic_read(&us122l->mmap_count))
 		msleep(500);
-- 
1.6.0.6