From 0bbf7e025fc89ded4925daeaf3619722b13b12d4 Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Mon, 29 Feb 2016 17:43:30 +0530
Subject: [PATCH] ALSA: mts64: fix NULL pointer dereference
While registering pardev, the irq_func was also registered. As a
result when we tried to probe for the card, an interrupt was generated
and in the ISR we tried to dereference private_data. But private_data
is still NULL as we have not yet done snd_mts64_create(). Lets probe
for the card after mts64 is created.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Fixes: 94a573500d48 ("ALSA: mts64: use new parport device model")
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/drivers/mts64.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/sound/drivers/mts64.c b/sound/drivers/mts64.c
index c76bd87071c69..fd4d18df84d36 100644
--- a/sound/drivers/mts64.c
+++ b/sound/drivers/mts64.c
@@ -964,11 +964,6 @@ static int snd_mts64_probe(struct platform_device *pdev)
err = -EIO;
goto free_pardev;
}
- err = mts64_probe(p);
- if (err) {
- err = -EIO;
- goto release_pardev;
- }
if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
snd_printd("Cannot create main component\n");
@@ -976,6 +971,12 @@ static int snd_mts64_probe(struct platform_device *pdev)
}
card->private_data = mts;
card->private_free = snd_mts64_card_private_free;
+
+ err = mts64_probe(p);
+ if (err) {
+ err = -EIO;
+ goto __err;
+ }
if ((err = snd_mts64_rawmidi_create(card)) < 0) {
snd_printd("Creating Rawmidi component failed\n");