Update of /cvsroot/alsa/alsa-kernel/pci
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv31686
Modified Files:
intel8x0.c
Log Message:
Added spinlock to pointer callback - ichdev->position is not changed atomically
Index: intel8x0.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/intel8x0.c,v
retrieving revision 1.116
retrieving revision 1.117
diff -u -r1.116 -r1.117
--- intel8x0.c 11 Feb 2004 12:06:57 -0000 1.116
+++ intel8x0.c 12 Feb 2004 16:12:47 -0000 1.117
@@ -1022,6 +1022,7 @@
{
intel8x0_t *chip = snd_pcm_substream_chip(substream);
ichdev_t *ichdev = get_ichdev(substream);
+ unsigned long flags;
size_t ptr1, ptr;
ptr1 = igetword(chip, ichdev->reg_offset + ichdev->roff_picb) <<
chip->pcm_pos_shift;
@@ -1029,7 +1030,9 @@
ptr = ichdev->fragsize1 - ptr1;
else
ptr = 0;
+ spin_lock_irqsave(&chip->reg_lock, flags);
ptr += ichdev->position;
+ spin_unlock_irqrestore(&chip->reg_lock, flags);
if (ptr >= ichdev->size)
return 0;
return bytes_to_frames(substream->runtime, ptr);
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