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[POWERPC] spufs: Fix timing dependent false return from spufs_run_spu 

Stop bits are only valid when the running bit is not set.  Status bits
carry over from one invocation of spufs_run_spu() to another, so the
RUNNING bit gets added to the previous state of the register which may
have been a remote library call.  In this case, it looks like another
library routine should be invoked, but the spe is actually running.

This fixes a problem with a testcase that exercises the scheduler.

Signed-off-by: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Luke Browning 2008-02-08 15:50:41 +11:00 committed by Paul Mackerras
parent e66686b414
commit 85687ff2b4
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/platforms/cell/spufs/run.c
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@ -53,7 +53,7 @@ int spu_stopped(struct spu_context *ctx, u32 *stat)
stopped = SPU_STATUS_INVALID_INSTR | SPU_STATUS_SINGLE_STEP |
SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP;
if (*stat & stopped)
if (!(*stat & SPU_STATUS_RUNNING) && (*stat & stopped))
return 1;
dsisr = ctx->csa.dsisr;