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authorJaroslav Kysela <perex@perex.cz>2009-05-28 08:12:27 -0400
committerTakashi Iwai <tiwai@suse.de>2009-05-29 02:15:57 -0400
commit3fd43858c7937801134bd70ef1d411e44f9c0c1c (patch)
tree01469fbd03e06e4705d1e7cf2537cc76f3d8cea9 /sound/pci/au88x0
parentcd86a536c81e9300d984327517548ca0652eebf9 (diff)
ALSA: au88x0: fix .pointer callback
Appearently, the used mask in the .pointer callback is invalid. It should be in period_bytes range. The period_bytes is pow(2), so simple bitwise operation is used. Idea was taken from ALSA bug#4455. Signed-off-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/au88x0')
-rw-r--r--sound/pci/au88x0/au88x0_core.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/sound/pci/au88x0/au88x0_core.c b/sound/pci/au88x0/au88x0_core.c
index 3906f5afe27a..f84bb19c7fdd 100644
--- a/sound/pci/au88x0/au88x0_core.c
+++ b/sound/pci/au88x0/au88x0_core.c
@@ -1255,8 +1255,8 @@ static int inline vortex_adbdma_getlinearpos(vortex_t * vortex, int adbdma)
1255 int temp; 1255 int temp;
1256 1256
1257 temp = hwread(vortex->mmio, VORTEX_ADBDMA_STAT + (adbdma << 2)); 1257 temp = hwread(vortex->mmio, VORTEX_ADBDMA_STAT + (adbdma << 2));
1258 temp = (dma->period_virt * dma->period_bytes) + (temp & POS_MASK); 1258 temp = (dma->period_virt * dma->period_bytes) + (temp & (dma->period_bytes - 1));
1259 return (temp); 1259 return temp;
1260} 1260}
1261 1261
1262static void vortex_adbdma_startfifo(vortex_t * vortex, int adbdma) 1262static void vortex_adbdma_startfifo(vortex_t * vortex, int adbdma)
@@ -1504,8 +1504,7 @@ static int inline vortex_wtdma_getlinearpos(vortex_t * vortex, int wtdma)
1504 int temp; 1504 int temp;
1505 1505
1506 temp = hwread(vortex->mmio, VORTEX_WTDMA_STAT + (wtdma << 2)); 1506 temp = hwread(vortex->mmio, VORTEX_WTDMA_STAT + (wtdma << 2));
1507 //temp = (temp & POS_MASK) + (((temp>>WT_SUBBUF_SHIFT) & WT_SUBBUF_MASK)*(dma->cfg0&POS_MASK)); 1507 temp = (dma->period_virt * dma->period_bytes) + (temp & (dma->period_bytes - 1));
1508 temp = (temp & POS_MASK) + ((dma->period_virt) * (dma->period_bytes));
1509 return temp; 1508 return temp;
1510} 1509}
1511 1510