From: Jeremy Kerr <jk@ozlabs.org>
Date: Mon, 7 Apr 2008 07:42:36 +0000 (+1000)
Subject: [POWERPC] spufs: don't touch suspend bits when purging DMA queue
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=943906ba4bebf629d5cd770e48b8ec0ddc433869;p=deliverable%2Flinux.git

[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 d2a1249d36dd..65b423b6da48 100644
--- 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();
 }