Gitweb: http://git.kernel.org/linus/c2503cd3be9eacb1dd06ec5b6fba8bb06aac12a8
Commit: c2503cd3be9eacb1dd06ec5b6fba8bb06aac12a8
Parent: f9ffc5d6f0161b66202f2df9ecc42d1be241020d
Author: Takashi Iwai <tiwai@suse.de>
AuthorDate: Thu Mar 5 09:37:40 2009 +0100
Committer: Takashi Iwai <tiwai@suse.de>
CommitDate: Thu Mar 5 09:37:40 2009 +0100
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>
---
sound/pci/rme9652/hdsp.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index dc65fe1..314e735 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -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);
--
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