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authorTakashi Iwai <tiwai@suse.de>2012-07-23 11:35:55 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-08-09 08:27:53 -0700
commitde4bc9fc942526dbcb0246dbb2ca87ad9b3b02b0 (patch)
treec0c4d6d78a4b830e6f97c6e2a8606f59a1c66276
parentf45cd6dfe00503a2ff49920bf8365a55ea69edbb (diff)
downloadlinux-linaro-stable-de4bc9fc942526dbcb0246dbb2ca87ad9b3b02b0.tar.gz
ALSA: mpu401: Fix missing initialization of irq field
commit bc733d495267a23ef8660220d696c6e549ce30b3 upstream. The irq field of struct snd_mpu401 is supposed to be initialized to -1. Since it's set to zero as of now, a probing error before the irq installation results in a kernel warning "Trying to free already-free IRQ 0". Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=44821 Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--sound/drivers/mpu401/mpu401_uart.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index 2af09996a3d0..74f5a3da87e1 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -554,6 +554,7 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
spin_lock_init(&mpu->output_lock);
spin_lock_init(&mpu->timer_lock);
mpu->hardware = hardware;
+ mpu->irq = -1;
if (! (info_flags & MPU401_INFO_INTEGRATED)) {
int res_size = hardware == MPU401_HW_PC98II ? 4 : 2;
mpu->res = request_region(port, res_size, "MPU401 UART");