ALSA: hdsp - Ignore MIDI and PCM events in interrupts until initialized



Ignore MIDI and PCM events in the interrupt handler until the device
gets initialized properly.  Otherwise you may get kernel panic by the
access to uninitialized devices via hotplugging.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent f9ffc5d6

sound/pci/rme9652/hdsp.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -3740,6 +3740,9 @@ static irqreturn_t snd_hdsp_interrupt(int irq, void *dev_id)
		midi0status = hdsp_read (hdsp, HDSP_midiStatusIn0) & 0xff;
		midi1status = hdsp_read (hdsp, HDSP_midiStatusIn1) & 0xff;

		if (!(hdsp->state & HDSP_InitializationComplete))
		return IRQ_HANDLED;

		if (audio) {
		if (hdsp->capture_substream)
		snd_pcm_period_elapsed(hdsp->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);