[POWERPC] spufs: Fix SPE single-step mode

Currently we only catch debug events through the 0x3fff status;
spufs_run_spu doesn't handle single-step SPE events.

This change adds a handler for conditions where the SPE is stopped due
to single-step-mode.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/run.c b/arch/powerpc/platforms/cell/spufs/run.c
index c01a09da1e56..b4814c740d8a 100644
--- a/arch/powerpc/platforms/cell/spufs/run.c
+++ b/arch/powerpc/platforms/cell/spufs/run.c
@@ -410,8 +410,11 @@ long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *event)
          * since we have TIF_SINGLESTEP set, thus the kernel will do
          * it upon return from the syscall anyawy
          */
-        if ((status & SPU_STATUS_STOPPED_BY_STOP)
-            && (status >> SPU_STOP_STATUS_SHIFT) == 0x3fff) {
+        if (unlikely(status & SPU_STATUS_SINGLE_STEP))
+                ret = -ERESTARTSYS;
+
+        else if (unlikely((status & SPU_STATUS_STOPPED_BY_STOP)
+            && (status >> SPU_STOP_STATUS_SHIFT) == 0x3fff)) {
                 force_sig(SIGTRAP, current);
                 ret = -ERESTARTSYS;
         }