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ALSA: usb-audio: Check for possible chip NULL pointer before clearing probing flag

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Before clearing the probing flag in the error exit path, check that the
chip pointer is not NULL.

Signed-off-by: Thomas Pfaff <tpfaff@gmx.net>
Cc: <stable@kernel.org> [2.6.39+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Thomas Pfaff 2011-09-26 15:43:59 +02:00 • committed by Takashi Iwai
parent e0d32e335f
commit 61a6a108d1
1 changed files with 5 additions and 3 deletions
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8
sound/usb/card.c
View file

@ -530,9 +530,11 @@ snd_usb_audio_probe(struct usb_device *dev,
return chip; return chip;
__error: __error:
if (chip && !chip->num_interfaces) if (chip) {
snd_card_free(chip->card); if (!chip->num_interfaces)
chip->probing = 0; snd_card_free(chip->card);
chip->probing = 0;
}
mutex_unlock(&register_mutex); mutex_unlock(&register_mutex);
__err_val: __err_val:
return NULL; return NULL;