diff options
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 07de196f15aa..fec308e47b9d 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -247,6 +247,21 @@ static void scmi_handle_response(struct scmi_chan_info *cinfo, } xfer = &minfo->xfer_block[xfer_id]; + /* + * Even if a response was indeed expected on this slot at this point, + * a buggy platform could wrongly reply feeding us an unexpected + * delayed response we're not prepared to handle: bail-out safely + * blaming firmware. + */ + if (unlikely(msg_type == MSG_TYPE_DELAYED_RESP && !xfer->async_done)) { + dev_err(dev, + "Delayed Response for %d not expected! Buggy F/W ?\n", + xfer_id); + info->desc->ops->clear_channel(cinfo); + /* It was unexpected, so nobody will clear the xfer if not us */ + __scmi_xfer_put(minfo, xfer); + return; + } scmi_dump_header_dbg(dev, &xfer->hdr); |