Commit bc733d495267a23ef8660220d696c6e549ce30b3
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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: Takashi Iwai <tiwai@suse.de>
Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff
sound/drivers/mpu401/mpu401_uart.c
| ... | ... | @@ -554,6 +554,7 @@ |
| 554 | 554 | spin_lock_init(&mpu->output_lock); |
| 555 | 555 | spin_lock_init(&mpu->timer_lock); |
| 556 | 556 | mpu->hardware = hardware; |
| 557 | + mpu->irq = -1; | |
| 557 | 558 | if (! (info_flags & MPU401_INFO_INTEGRATED)) { |
| 558 | 559 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
| 559 | 560 | mpu->res = request_region(port, res_size, "MPU401 UART"); |