Subject: spufs: fix message count for wbox_info

From: Dwayne Grant McConnell <decimal@us.ibm.com>
The stat register holds the number of empty slots for wbox,
not the number of elements present.

Signed-off-by: Dwayne Grant McConnell <decimal@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

---
Dwayne Grant McConnell <decimal@us.ibm.com>
Lotus Notes Mail: Dwayne McConnell [Mail]/Austin/IBM@IBMUS
Lotus Notes Calendar: Dwayne McConnell [Calendar]/Austin/IBM@IBMUS

Index: linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
===================================================================
--- linux-2.6.orig/arch/powerpc/platforms/cell/spufs/file.c
+++ linux-2.6/arch/powerpc/platforms/cell/spufs/file.c
@@ -1636,7 +1636,7 @@ static ssize_t spufs_wbox_info_read(stru
 	spu_acquire_saved(ctx);
 	spin_lock(&ctx->csa.register_lock);
 	wbox_stat = ctx->csa.prob.mb_stat_R;
-	cnt = (wbox_stat & 0x00ff00) >> 8;
+	cnt = 4 - ((wbox_stat & 0x00ff00) >> 8);
 	for (i = 0; i < cnt; i++) {
 		data[i] = ctx->csa.spu_mailbox_data[i];
 	}