Merge tag 'v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Sync with upstream (which now contains fbdev-v4.19 changes) to
prepare a base for fbdev-v4.20 changes.

1 files changed, 31 insertions, 9 deletions

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 8350ca2311c7..398393ab5df8 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -506,10 +506,31 @@ int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
 }
 EXPORT_SYMBOL(cros_ec_cmd_xfer_status);
 
+static int get_next_event_xfer(struct cros_ec_device *ec_dev,
+			       struct cros_ec_command *msg,
+			       int version, uint32_t size)
+{
+	int ret;
+
+	msg->version = version;
+	msg->command = EC_CMD_GET_NEXT_EVENT;
+	msg->insize = size;
+	msg->outsize = 0;
+
+	ret = cros_ec_cmd_xfer(ec_dev, msg);
+	if (ret > 0) {
+		ec_dev->event_size = ret - 1;
+		memcpy(&ec_dev->event_data, msg->data, ec_dev->event_size);
+	}
+
+	return ret;
+}
+
 static int get_next_event(struct cros_ec_device *ec_dev)
 {
 	u8 buffer[sizeof(struct cros_ec_command) + sizeof(ec_dev->event_data)];
 	struct cros_ec_command *msg = (struct cros_ec_command *)&buffer;
+	static int cmd_version = 1;
 	int ret;
 
 	if (ec_dev->suspended) {
@@ -517,18 +538,19 @@ static int get_next_event(struct cros_ec_device *ec_dev)
 		return -EHOSTDOWN;
 	}
 
-	msg->version = 0;
-	msg->command = EC_CMD_GET_NEXT_EVENT;
-	msg->insize = sizeof(ec_dev->event_data);
-	msg->outsize = 0;
+	if (cmd_version == 1) {
+		ret = get_next_event_xfer(ec_dev, msg, cmd_version,
+				sizeof(struct ec_response_get_next_event_v1));
+		if (ret < 0 || msg->result != EC_RES_INVALID_VERSION)
+			return ret;
 
-	ret = cros_ec_cmd_xfer(ec_dev, msg);
-	if (ret > 0) {
-		ec_dev->event_size = ret - 1;
-		memcpy(&ec_dev->event_data, msg->data,
-		       sizeof(ec_dev->event_data));
+		/* Fallback to version 0 for future send attempts */
+		cmd_version = 0;
 	}
 
+	ret = get_next_event_xfer(ec_dev, msg, cmd_version,
+				  sizeof(struct ec_response_get_next_event));
+
 	return ret;
 }