From 73522f0087cee4d3e290356e4ee6f2de5c516be4 Mon Sep 17 00:00:00 2001
From: "Andrew F. Davis" <afd@ti.com>
Date: Fri, 4 Jan 2019 12:49:16 -0600
Subject: [PATCH] ti: k3: drivers: ti_sci: Clear receive queue before
transmitting
Send and receive currently must be be serialized, any message already in
the receive queue when a new message is to be sent will cause a mismatch
with the expected response from this new message. Clear out all messages
from the response queue before sending a new request.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
---
plat/ti/k3/common/drivers/ti_sci/ti_sci.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/plat/ti/k3/common/drivers/ti_sci/ti_sci.c b/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
index b211bdf60..b4b120e4d 100644
--- a/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
+++ b/plat/ti/k3/common/drivers/ti_sci/ti_sci.c
@@ -158,6 +158,13 @@ static inline int ti_sci_do_xfer(struct ti_sci_xfer *xfer)
struct k3_sec_proxy_msg *msg = &xfer->tx_message;
int ret;
+ /* Clear any spurious messages in receive queue */
+ ret = k3_sec_proxy_clear_rx_thread(SP_RESPONSE);
+ if (ret) {
+ ERROR("Could not clear response queue (%d)\n", ret);
+ return ret;
+ }
+
/* Send the message */
ret = k3_sec_proxy_send(SP_HIGH_PRIORITY, msg);
if (ret) {
@@ -165,6 +172,7 @@ static inline int ti_sci_do_xfer(struct ti_sci_xfer *xfer)
return ret;
}
+ /* Get the response */
ret = ti_sci_get_response(xfer, SP_RESPONSE);
if (ret) {
ERROR("Failed to get response (%d)\n", ret);
--
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