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Commit c432b50a authored by Sathish Ambley's avatar Sathish Ambley Committed by Gerrit - the friendly Code Review server
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msm: ADSPRPC: Invalidate output buffers after receiving response 



Invalidate the output buffers after the remote processor has finished
flushing the data from its cache. This ensures that no stale entries
come into the application processor's cache while the remote processor
is working on the buffers.

Change-Id: I60828ff998c5eb48fe45815b434003041854b495
Signed-off-by: default avatarSathish Ambley <sathishambley@codeaurora.org>
Acked-by: default avatarViswanatham Paduchuri <vpaduchu@qti.qualcomm.com>
parent 5915565f

drivers/char/adsprpc.c

+7 −11
Original line number Diff line number Diff line
@@ -1381,24 +1381,14 @@ static int fastrpc_internal_invoke(struct fastrpc_file *fl, uint32_t mode, 
			goto bail;

	}



	PERF(fl->profile, fl->perf.invargs,

	if (!fl->sctx->smmu.coherent) {

	if (!fl->sctx->smmu.coherent)

		inv_args_pre(ctx);

		if (mode == FASTRPC_MODE_SERIAL)

			inv_args(ctx);

	}

	PERF_END);



	PERF(fl->profile, fl->perf.link,

	VERIFY(err, 0 == fastrpc_invoke_send(ctx, kernel, invoke->handle));

	PERF_END);



	if (err)

		goto bail;

	PERF(fl->profile, fl->perf.invargs,

	if (mode == FASTRPC_MODE_PARALLEL && !fl->sctx->smmu.coherent)

		inv_args(ctx);

	PERF_END);

 wait:

	if (kernel)

		wait_for_completion(&ctx->work);
@@ -1408,6 +1398,12 @@ static int fastrpc_internal_invoke(struct fastrpc_file *fl, uint32_t mode, 
		if (err)

			goto bail;

	}



	PERF(fl->profile, fl->perf.invargs,

	if (!fl->sctx->smmu.coherent)

		inv_args(ctx);

	PERF_END);



	VERIFY(err, 0 == (err = ctx->retval));

	if (err)

		goto bail;