Merge commit 'v2.6.33-rc2' into for-2.6.33

1 files changed, 9 insertions, 1 deletions

diff --git a/sound/core/isadma.c b/sound/core/isadma.c
index 79f0f16af339..950e19ba91fc 100644
--- a/sound/core/isadma.c
+++ b/sound/core/isadma.c
@@ -85,16 +85,24 @@ EXPORT_SYMBOL(snd_dma_disable);
 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size)
 {
         unsigned long flags;
-        unsigned int result;
+        unsigned int result, result1;
 
         flags = claim_dma_lock();
         clear_dma_ff(dma);
         if (!isa_dma_bridge_buggy)
                 disable_dma(dma);
         result = get_dma_residue(dma);
+        /*
+         * HACK - read the counter again and choose higher value in order to
+         * avoid reading during counter lower byte roll over if the
+         * isa_dma_bridge_buggy is set.
+         */
+        result1 = get_dma_residue(dma);
         if (!isa_dma_bridge_buggy)
                 enable_dma(dma);
         release_dma_lock(flags);
+        if (unlikely(result < result1))
+                result = result1;
 #ifdef CONFIG_SND_DEBUG
         if (result > size)
                 snd_printk(KERN_ERR "pointer (0x%x) for DMA #%ld is greater than transfer size (0x%x)\n", result, dma, size);