ALSA: mtpav - Fix race in probe

Ingo reported Oops at probing mtpav driver.  It's a race between
the irq handler and the rawmidi instance registration.

This patch fixes the order of registration to avoid the race.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 4 insertions, 4 deletions

diff --git a/sound/drivers/mtpav.c b/sound/drivers/mtpav.c
index b5e1a71bb64b..5b89c0883d60 100644
--- a/sound/drivers/mtpav.c
+++ b/sound/drivers/mtpav.c
@@ -715,6 +715,10 @@ static int __devinit snd_mtpav_probe(struct platform_device *dev)
 
         card->private_free = snd_mtpav_free;
 
+        err = snd_mtpav_get_RAWMIDI(mtp_card);
+        if (err < 0)
+                goto __error;
+
         err = snd_mtpav_get_ISA(mtp_card);
         if (err < 0)
                 goto __error;
@@ -724,10 +728,6 @@ static int __devinit snd_mtpav_probe(struct platform_device *dev)
         snprintf(card->longname, sizeof(card->longname),
                  "MTPAV on parallel port at 0x%lx", port);
 
-        err = snd_mtpav_get_RAWMIDI(mtp_card);
-        if (err < 0)
-                goto __error;
-
         snd_mtpav_portscan(mtp_card);
 
         snd_card_set_dev(card, &dev->dev);