OpenSDV
/
linux-stable-rt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
This commit is contained in:
Luke Browning 2008-06-16 10:42:38 +10:00 committed by Jeremy Kerr
parent 2c911a14b7
commit 028fda0a6c
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/platforms/cell/spufs/sched.c
View File

@ -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);
}
/**