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USB: gadget: midi: Fix deadlock unbinding driver while it is in use

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Using snd_card_free_when_closed rather than snd_card_free in f_midi_unbind
makes it safe to disable the driver while a userspace client has the
ALSA device open.

Change-Id: Ibc40c01e7b1ce90fc61d3ea654b4816fadfc7ffd
Signed-off-by: Mike Lockwood <lockwood@google.com>
This commit is contained in:
Mike Lockwood 2015-01-29 13:37:06 -08:00
parent 4be5c6a45a
commit 261230ce54
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/gadget/f_midi.c
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@ -409,7 +409,7 @@ static void f_midi_unbind(struct usb_configuration *c, struct usb_function *f)
card = midi->card;
midi->card = NULL;
if (card)
snd_card_free(card);
snd_card_free_when_closed(card);
kfree(midi->id);
midi->id = NULL;