diff options
Diffstat (limited to 'drivers/misc/fastrpc.c')
| -rw-r--r-- | drivers/misc/fastrpc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index ecb56648b1bb..986c9aee539a 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -792,6 +792,9 @@ static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, if (err) goto bail; } + + /* make sure that all CPU memory writes are seen by DSP */ + dma_wmb(); /* Send invoke buffer to remote dsp */ err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); if (err) @@ -808,6 +811,8 @@ static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, goto bail; if (ctx->nscalars) { + /* make sure that all memory writes by DSP are seen by CPU */ + dma_rmb(); /* populate all the output buffers with results */ err = fastrpc_put_args(ctx, kernel); if (err) |