Update of /cvsroot/alsa/alsa-kernel/pci
In directory sc8-pr-cvs1:/tmp/cvs-serv6142
Modified Files:
maestro3.c
Log Message:
- protect pointer callback with spinlock for SMP systems.
Index: maestro3.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/maestro3.c,v
retrieving revision 1.39
retrieving revision 1.40
diff -u -r1.39 -r1.40
--- maestro3.c 1 Jul 2003 13:08:38 -0000 1.39
+++ maestro3.c 24 Jul 2003 19:05:16 -0000 1.40
@@ -1535,9 +1535,14 @@
snd_m3_pcm_pointer(snd_pcm_substream_t * subs)
{
m3_t *chip = snd_pcm_substream_chip(subs);
+ unsigned int ptr;
m3_dma_t *s = (m3_dma_t*)subs->runtime->private_data;
snd_assert(s != NULL, return 0);
- return bytes_to_frames(subs->runtime, snd_m3_get_pointer(chip, s, subs));
+
+ spin_lock(&chip->reg_lock);
+ ptr = snd_m3_get_pointer(chip, s, subs);
+ spin_unlock(&chip->reg_lock);
+ return bytes_to_frames(subs->runtime, ptr);
}
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