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Commit 028fda0a authored by Luke Browning's avatar Luke Browning Committed by Jeremy Kerr
Browse files

powerpc/spufs: fix missed stop-and-signal event 



There is a delay in the transition to the stopped state for class 2
interrupts. In some cases, the controlling thread detects the state of
the spu as running, and goes back to sleep resulting in a hung
application as the event is missed.

This change detects the stop condition and re-generates the wakeup event
after a context save.

Signed-off-by: default avatarLuke Browning <lukebrowning@us.ibm.com>
Signed-off-by: default avatarJeremy Kerr <jk@ozlabs.org>
parent 2c911a14

arch/powerpc/platforms/cell/spufs/sched.c

+5 −0
Original line number Diff line number Diff line
@@ -407,6 +407,8 @@ static int has_affinity(struct spu_context *ctx) 
 */

static void spu_unbind_context(struct spu *spu, struct spu_context *ctx)

{

	u32 status;



	spu_context_trace(spu_unbind_context__enter, ctx, spu);



	spuctx_switch_state(ctx, SPU_UTIL_SYSTEM);
@@ -452,6 +454,9 @@ static void spu_unbind_context(struct spu *spu, struct spu_context *ctx) 
	/* This maps the underlying spu state to idle */

	spuctx_switch_state(ctx, SPU_UTIL_IDLE_LOADED);

	ctx->spu = NULL;



	if (spu_stopped(ctx, &status))

		wake_up_all(&ctx->stop_wq);

}



/**