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 | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c index 012ff1f..a5aae9d 100644 --- a/sound/usb/usx2y/us122l.c +++ b/sound/usb/usx2y/us122l.c @@ -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);