On 8 June 2015 at 16:09, Sudeep Holla [off-list ref] wrote:
...

+
+static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd)
+{
+       unsigned long flags;
+       struct scpi_xfer *t, *match = NULL;
+
+       spin_lock_irqsave(&ch->rx_lock, flags);
+       if (list_empty(&ch->rx_pending)) {
+               spin_unlock_irqrestore(&ch->rx_lock, flags);
+               return;
+       }
+
+       list_for_each_entry(t, &ch->rx_pending, node)
+               if (CMD_XTRACT_UNIQ(t->cmd) == CMD_XTRACT_UNIQ(cmd)) {
+                       list_del(&t->node);
+                       match = t;
+                       break;
+               }
+       /* check if wait_for_completion is in progress or timed-out */
+       if (match && !completion_done(&match->done)) {
+               struct scpi_shared_mem *mem = ch->rx_payload;
+               unsigned int len = min(match->rx_len, CMD_SIZE(cmd));
+
+               match->status = le32_to_cpu(mem->status);
+               memcpy_fromio(match->rx_buf, mem->payload, len);
+               if (match->rx_len > len)
+                       memset(match->rx_buf + len, 0, match->rx_len - len);
+               complete(&match->done);
+       }
+       spin_unlock_irqrestore(&ch->rx_lock, flags);
+}

There doesn't seem to be support for commands sent by remote?
Something like when remote is the thermal master and it needs to send
sensor readings crossing thresholds.