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| author | Arnd Bergmann <arnd@arndb.de> | 2006-01-04 20:31:24 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 15:44:39 +1100 |
| commit | 5ef8224aaa9220bfecb362f0802cf78aad47c02a (patch) | |
| tree | 3288b9510d4ab36d627cf85f1b4160a6d8ff9823 /arch/powerpc/platforms/cell/spufs/file.c | |
| parent | e80358ad8606382154d97165121602dfae213e4a (diff) | |
| download | op-kernel-dev-5ef8224aaa9220bfecb362f0802cf78aad47c02a.zip op-kernel-dev-5ef8224aaa9220bfecb362f0802cf78aad47c02a.tar.gz | |
[PATCH] spufs: serialize sys_spu_run per spu
During an earlier cleanup, we lost the serialization
of multiple spu_run calls performed on the same
spu_context. In order to get this back, introduce a
mutex in the spu_context that is held inside of spu_run.
Noticed by Al Viro.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/file.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/file.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c index 9738de7..e634268 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -620,8 +620,12 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx, { int ret; - if ((ret = spu_run_init(ctx, npc, status)) != 0) - return ret; + if (down_interruptible(&ctx->run_sema)) + return -ERESTARTSYS; + + ret = spu_run_init(ctx, npc, status); + if (ret) + goto out; do { ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, status)); @@ -629,9 +633,8 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx, break; if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) { ret = spu_reacquire_runnable(ctx, npc, status); - if (ret) { - return ret; - } + if (ret) + goto out; continue; } ret = spu_process_events(ctx); @@ -645,6 +648,8 @@ long spufs_run_spu(struct file *file, struct spu_context *ctx, ret = *status; spu_yield(ctx); +out: + up(&ctx->run_sema); return ret; } |
