forked from ~ljy/RK356X_SDK_RELEASE

blame | history | patch | commit | commitdiff
hc
2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/drivers/rpmsg/rpmsg_core.c
....@@ -319,6 +319,29 @@
319319 }
320320 EXPORT_SYMBOL(rpmsg_set_signals);
321321 
322
+#ifdef CONFIG_NO_GKI
323
+/**
324
+ * rpmsg_get_mtu() - get maximum transmission buffer size for sending message.
325
+ * @ept: the rpmsg endpoint
326
+ *
327
+ * This function returns maximum buffer size available for a single outgoing message.
328
+ *
329
+ * Return: the maximum transmission size on success and an appropriate error
330
+ * value on failure.
331
+ */
332
+
333
+ssize_t rpmsg_get_mtu(struct rpmsg_endpoint *ept)
334
+{
335
+	if (WARN_ON(!ept))
336
+		return -EINVAL;
337
+	if (!ept->ops->get_mtu)
338
+		return -ENOTSUPP;
339
+
340
+	return ept->ops->get_mtu(ept);
341
+}
342
+EXPORT_SYMBOL(rpmsg_get_mtu);
343
+#endif
344
+
322345 /*
323346  * match a rpmsg channel with a channel info struct.
324347  * this is used to make sure we're not creating rpmsg devices for channels