commit 362461212649675574c88e15c9d58292989d8df7
author David Dai <daidavid1@codeaurora.org> Thu Oct 12 16:12:11 2017 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Thu Oct 12 16:33:31 2017 -0700
tree 6557fd2cb9d4381a9afca666cd6f2b86bf7dc085
parent 9c9a0530abbb1b0a4824d29df3dd2d533081504f

msm: msm_bus: Disallow single node paths

Reject clients that attempt to register paths that have the
same source and destination.

Change-Id: Ied94efec2fe20188b11bf67337f04a23b33b2723
Signed-off-by: David Dai <daidavid1@codeaurora.org>

drivers/soc/qcom/msm_bus/msm_bus_arb_rpmh.c

diff --git a/drivers/soc/qcom/msm_bus/msm_bus_arb_rpmh.c b/drivers/soc/qcom/msm_bus/msm_bus_arb_rpmh.c
index a40efcb..437984c 100644
--- a/drivers/soc/qcom/msm_bus/msm_bus_arb_rpmh.c
+++ b/drivers/soc/qcom/msm_bus/msm_bus_arb_rpmh.c
@@ -1294,7 +1294,7 @@
 		src = pdata->usecase->vectors[i].src;
 		dest = pdata->usecase->vectors[i].dst;
 
-		if ((src < 0) || (dest < 0)) {
+		if ((src < 0) || (dest < 0) || (src == dest)) {
 			MSM_BUS_ERR("%s:Invalid src/dst.src %d dest %d",
 				__func__, src, dest);
 			goto exit_invalid_data;