[PATCH] update for ALi5455 Audio Driver for 2.4.20

[PATCH] update for ALi5455 Audio Driver for 2.4.20

[wei_ni]

Dear all,

We resolve the bugs in ALi5455 audio driver.

Best regards,

Ni wei
http://www.ali.com.tw

Information about update:
Updated files:      ali5455.c
Location:      drivers/sound
Driver Version:     0.02ac
Kernel Version:     2.4.20

patchfile for ali5455.c:
---------------------------------------------------------------------------------
--- ali5455.c.orig  2003-11-12 10:14:05.000000000 +0800
+++ ali5455.c  2003-11-12 10:48:26.000000000 +0800
@@ -1253,17 +1253,15 @@
 {
     struct dmabuf *dmabuf = &state->dmabuf;
     int free;
-    ali_update_ptr(state);
-    // catch underruns during playback
+
     if (dmabuf->count < 0) {
          dmabuf->count = 0;
          dmabuf->swptr = dmabuf->hwptr;
     }
-    free = dmabuf->dmasize - dmabuf->count;
-    free -= (dmabuf->hwptr % dmabuf->fragsize);
-    if (free < 0)
-         return (0);
-    return (free);
+    free = dmabuf->dmasize - dmabuf->swptr;
+    if ((dmabuf->count + free) > dmabuf->dmasize)
+         free = dmabuf->dmasize - dmabuf->count;
+    return free;
 }

 static inline int ali_get_available_read_data(struct
@@ -1859,6 +1857,7 @@
                  NOTHING we can do to prevent it. */

               /* FIXME - do timeout handling here !! */
+              schedule_timeout(tmo >= 2 ? tmo : 2);

               if (signal_pending(current)) {
                    if (!ret)
@@ -1959,7 +1958,7 @@
     if (size > (PAGE_SIZE << dmabuf->buforder))
          goto out;
     ret = -EAGAIN;
-    if (remap_page_range(vma->vm_start, virt_to_phys(dmabuf->rawbuf),
size, vma->vm_page_prot))
+    if (remap_page_range(vma,vma->vm_start, virt_to_phys(dmabuf->rawbuf),
size, vma->vm_page_prot))
          goto out;
     dmabuf->mapped = 1;
     dmabuf->trigger = 0;

Ni Wei
2003-11-12