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| author | Adrian Knoth <adi@drcomp.erfurt.thur.de> | 2011-06-12 17:26:17 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-06-12 18:49:42 +0200 |
| commit | c0da00145f9a32ef33b14508e6fd90fc130afbdc (patch) | |
| tree | c244dc13b4560f6169ef10890ca1a738e243c1cb /sound | |
| parent | 05e205429d3f73ad4f9f0d84e8a95e978237d6fd (diff) | |
| download | linux-c0da00145f9a32ef33b14508e6fd90fc130afbdc.tar.gz linux-c0da00145f9a32ef33b14508e6fd90fc130afbdc.tar.bz2 linux-c0da00145f9a32ef33b14508e6fd90fc130afbdc.zip | |
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 <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/rme9652/hdspm.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); } |