Commit c2503cd3 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent f9ffc5d6

sound/pci/rme9652/hdsp.c

+3 −0
Original line number Original line 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;

	midi0status = hdsp_read (hdsp, HDSP_midiStatusIn0) & 0xff;

	midi1status = hdsp_read (hdsp, HDSP_midiStatusIn1) & 0xff;

	midi1status = hdsp_read (hdsp, HDSP_midiStatusIn1) & 0xff;





	if (!(hdsp->state & HDSP_InitializationComplete))

		return IRQ_HANDLED;



	if (audio) {

	if (audio) {

		if (hdsp->capture_substream)

		if (hdsp->capture_substream)

			snd_pcm_period_elapsed(hdsp->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);

			snd_pcm_period_elapsed(hdsp->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);

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