From c0da00145f9a32ef33b14508e6fd90fc130afbdc Mon Sep 17 00:00:00 2001 From: Adrian Knoth Date: Sun, 12 Jun 2011 17:26:17 +0200 Subject: [PATCH] ALSA: hdspm - Fix locking in snd_hdspm_midi_input_read For the MIDI part, we need to acquire (and release) the hmidi->lock, access to the global hdspm structure is serialized through hmidi->hdspm->lock instead. Signed-off-by: Adrian Knoth Signed-off-by: Takashi Iwai --- sound/pci/rme9652/hdspm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 949691a876d3..32d80af012cc 100644 --- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -1639,12 +1639,14 @@ static int snd_hdspm_midi_input_read (struct hdspm_midi *hmidi) } } hmidi->pending = 0; + spin_unlock_irqrestore(&hmidi->lock, flags); + spin_lock_irqsave(&hmidi->hdspm->lock, flags); hmidi->hdspm->control_register |= hmidi->ie; hdspm_write(hmidi->hdspm, HDSPM_controlRegister, hmidi->hdspm->control_register); + spin_unlock_irqrestore(&hmidi->hdspm->lock, flags); - spin_unlock_irqrestore (&hmidi->lock, flags); return snd_hdspm_midi_output_write (hmidi); } -- 2.20.1