Check the header flags if an response is expected or not. If it is not
expected skip the receive part of ti_sci_do_xfer(). This prepares the
driver for one-way messages as prepare_sleep for Partial-IO.
Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
---
drivers/firmware/ti_sci.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 806a975fff22ae00ecb88587b2c47ba172120bc2..09d11e75e14e6a6a82f6d99ab1852c142aeb7e5f 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -398,6 +398,9 @@ static void ti_sci_put_one_xfer(struct ti_sci_xfers_info *minfo,
static inline int ti_sci_do_xfer(struct ti_sci_info *info,
struct ti_sci_xfer *xfer)
{
+ struct ti_sci_msg_hdr *hdr = (struct ti_sci_msg_hdr *)xfer->tx_message.buf;
+ bool response_expected = !!(hdr->flags & (TI_SCI_FLAG_REQ_ACK_ON_PROCESSED |
+ TI_SCI_FLAG_REQ_ACK_ON_RECEIVED));
int ret;
int timeout;
struct device *dev = info->dev;
@@ -409,12 +412,12 @@ static inline int ti_sci_do_xfer(struct ti_sci_info *info,
ret = 0;
- if (system_state <= SYSTEM_RUNNING) {
+ if (response_expected && system_state <= SYSTEM_RUNNING) {
/* And we wait for the response. */
timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms);
if (!wait_for_completion_timeout(&xfer->done, timeout))
ret = -ETIMEDOUT;
- } else {
+ } else if (response_expected) {
/*
* If we are !running, we cannot use wait_for_completion_timeout
* during noirq phase, so we must manually poll the completion.
--
2.47.2
