From 7feb547c6fc5f2b6469ebe703cdf7e4ac4691249 Mon Sep 17 00:00:00 2001
From: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
Date: Wed, 10 Jan 2024 12:14:32 +0800
Subject: [PATCH] drivers/usbdev: stop read when container length is less than
 the maximum length.

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
---
 drivers/usbdev/usbdev_fs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/usbdev/usbdev_fs.c b/drivers/usbdev/usbdev_fs.c
index 23c69400a1..ed3f13a6fe 100644
--- a/drivers/usbdev/usbdev_fs.c
+++ b/drivers/usbdev/usbdev_fs.c
@@ -644,6 +644,16 @@ static ssize_t usbdev_fs_read(FAR struct file *filep, FAR char *buffer,
 
           PANIC();
         }
+
+      /* The container buffer length is less than the maximum length.
+       * It is an independent packet of requests and needs to be
+       * returned directly.
+       */
+
+      if (reqlen < fs_ep->ep->maxpacket)
+        {
+          break;
+        }
     }
 
   nxmutex_unlock(&fs_ep->lock);