[POWERPC] spufs: don't touch suspend bits when purging DMA queue

When we issue a MFC purge request, we may inadvertantly clear the
suspended status.

This change adds the MFC_CNTL_SUSPEND_MASK when we issue a purge
request, so that the suspend bit is masked out.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index d2a1249d36dd2a7bc018727e09c3b7c57b88cf1c..65b423b6da483a713a0c9395e986b4d9c117df1d 100644 (file)
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -462,7 +462,9 @@ static inline void purge_mfc_queue(struct spu_state *csa, struct spu *spu)
         * Restore, Step 14.
         *     Write MFC_CNTL[Pc]=1 (purge queue).
         */
-       out_be64(&priv2->mfc_control_RW, MFC_CNTL_PURGE_DMA_REQUEST);
+       out_be64(&priv2->mfc_control_RW,
+                       MFC_CNTL_PURGE_DMA_REQUEST |
+                       MFC_CNTL_SUSPEND_MASK);
        eieio();
 }