[alsa-devel] [PATCH] usb-audio: Check for possible chip NULL pointer before clearing probing flag

26 Sep 2011

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
---
diff -urp a/sound/usb/card.c b/sound/usb/card.c

--- a/sound/usb/card.c	2011-09-26 14:58:02.468672118 +0200
+++ b/sound/usb/card.c	2011-09-26 15:00:30.313110086 +0200
@@ -530,9 +530,11 @@ snd_usb_audio_probe(struct usb_device *d
    return chip;
__error:
-	if (chip && !chip->num_interfaces)
-		snd_card_free(chip->card);
-	chip->probing = 0;
+	if (chip) {
+		if (!chip->num_interfaces)
+			snd_card_free(chip->card);
+		chip->probing = 0;
+	}
    mutex_unlock(&register_mutex);
  __err_val:
    return NULL;

    