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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>
This commit is contained in:
Andrew F. Davis 2019-01-04 12:49:16 -06:00
parent 2004552e62
commit 73522f0087
1 changed files with 8 additions and 0 deletions
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8
plat/ti/k3/common/drivers/ti_sci/ti_sci.c
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@ -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);