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Commit bc733d49 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: mpu401: Fix missing initialization of irq field 

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


Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 6162552b

sound/drivers/mpu401/mpu401_uart.c

+1 −0
Original line number Diff line number Diff line
@@ -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");