diff --git a/bsp/at32/libraries/rt_drivers/drv_usbd.c b/bsp/at32/libraries/rt_drivers/drv_usbd.c
index ef9cb8ddd8..96e1fecfce 100644
--- a/bsp/at32/libraries/rt_drivers/drv_usbd.c
+++ b/bsp/at32/libraries/rt_drivers/drv_usbd.c
@@ -1,11 +1,12 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2023, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2023-02-28     leo          first version
+ * 2023-10-11     ChuShicheng  change rt_size_t to rt_ssize_t
  */
 
 #include <rtthread.h>
@@ -152,20 +153,20 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     RT_ASSERT(buffer != RT_NULL);
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     usbd_ept_recv(p_usbd_instance->p_usbd_core, address, buffer, size);
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     usbd_ept_send(p_usbd_instance->p_usbd_core, address, buffer, size);
     return size;
diff --git a/bsp/at32/libraries/rt_drivers/drv_usbfsd.c b/bsp/at32/libraries/rt_drivers/drv_usbfsd.c
index 00764e44d3..8c2db41ed7 100644
--- a/bsp/at32/libraries/rt_drivers/drv_usbfsd.c
+++ b/bsp/at32/libraries/rt_drivers/drv_usbfsd.c
@@ -1,11 +1,12 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2023, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2023-02-28     leo          first version
+ * 2023-10-11     ChuShicheng  change rt_size_t to rt_ssize_t
  */
 
 #include <rtthread.h>
@@ -175,20 +176,20 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     RT_ASSERT(buffer != RT_NULL);
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     usbd_ept_recv(&p_usbfs_instance->p_otg_core->dev, address, buffer, size);
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     usbd_ept_send(&p_usbfs_instance->p_otg_core->dev, address, buffer, size);
     return size;
diff --git a/bsp/imx/imx6ull-smart/drivers/drv_usbd.c b/bsp/imx/imx6ull-smart/drivers/drv_usbd.c
index 9e7c8ad108..acf13fbbbd 100644
--- a/bsp/imx/imx6ull-smart/drivers/drv_usbd.c
+++ b/bsp/imx/imx6ull-smart/drivers/drv_usbd.c
@@ -6,6 +6,7 @@
  * Change Logs:
  * Date           Author       Notes
  * 2017-12-04     ZYH          first implementation
+ * 2023-10-11     ChuShicheng  change rt_size_t to rt_ssize_t
  */
 #include <usb/include/usb_device_config.h>
 #include <usb/include/usb.h>
@@ -161,7 +162,7 @@ static rt_err_t _ehci0_ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ehci0_ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ehci0_ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
 
@@ -170,13 +171,13 @@ static rt_size_t _ehci0_ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ehci0_ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ehci0_ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     USB_DeviceRecvRequest(ehci0_handle, address, buffer, size);
     return size;
 }
 
-static rt_size_t _ehci0_ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ehci0_ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     USB_DeviceSendRequest(ehci0_handle, address, buffer, size);
     return size;
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
index fdac21ff1e..83159506db 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2021-02-24      klcheng          First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -192,7 +193,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -208,7 +209,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -217,7 +218,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
index ce601c4253..246a8ac8c0 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2020-09-17      CHChen           First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -229,7 +230,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -245,7 +246,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -254,7 +255,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
index 0011cacb22..e9bcfabcb0 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2022-3-15       Wayne            First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -276,7 +277,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -292,7 +293,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -301,7 +302,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
index 2df21ac8d4..f4daa4b79d 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2020-3-25       Egbert           First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -210,7 +211,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -226,7 +227,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -235,7 +236,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
index 876c6d96c2..5bc43309dd 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2021-03-16      Wayne            First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -436,7 +437,7 @@ __STATIC_INLINE void nu_buffer_cpy(rt_uint8_t address, void *buffer, rt_size_t s
     }
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size  = 0;
 
@@ -464,7 +465,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -496,7 +497,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
 
     RT_ASSERT((address & USB_DIR_IN));
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
index ae563d1a1e..3b1efdad2e 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
@@ -7,6 +7,7 @@
 * Change Logs:
 * Date            Author           Notes
 * 2020-12-25      Wayne            First version
+* 2023-10-11     ChuShicheng       change rt_size_t to rt_ssize_t
 *
 ******************************************************************************/
 
@@ -437,7 +438,7 @@ __STATIC_INLINE void nu_buffer_cpy(rt_uint8_t address, void *buffer, rt_size_t s
     }
 }
 
-static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size  = 0;
 
@@ -465,7 +466,7 @@ static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -497,7 +498,7 @@ static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t si
     return size;
 }
 
-static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
 
     RT_ASSERT((address & USB_DIR_IN));
diff --git a/components/drivers/include/drivers/usb_device.h b/components/drivers/include/drivers/usb_device.h
index 42636a939f..db737afaf7 100644
--- a/components/drivers/include/drivers/usb_device.h
+++ b/components/drivers/include/drivers/usb_device.h
@@ -9,6 +9,7 @@
  * 2012-12-12     heyuanjie87  change endpoint and function handler
  * 2013-04-26     aozima       add DEVICEQUALIFIER support.
  * 2017-11-15     ZYH          fix ep0 transform error
+ * 2023-10-11     ChuShicheng  change rt_size_t to rt_ssize_t
  */
 
 #ifndef  __USB_DEVICE_H__
@@ -86,9 +87,9 @@ struct udcd_ops
     rt_err_t (*ep_clear_stall)(rt_uint8_t address);
     rt_err_t (*ep_enable)(struct uendpoint* ep);
     rt_err_t (*ep_disable)(struct uendpoint* ep);
-    rt_size_t (*ep_read_prepare)(rt_uint8_t address, void *buffer, rt_size_t size);
-    rt_size_t (*ep_read)(rt_uint8_t address, void *buffer);
-    rt_size_t (*ep_write)(rt_uint8_t address, void *buffer, rt_size_t size);
+    rt_ssize_t (*ep_read_prepare)(rt_uint8_t address, void *buffer, rt_size_t size);
+    rt_ssize_t (*ep_read)(rt_uint8_t address, void *buffer);
+    rt_ssize_t (*ep_write)(rt_uint8_t address, void *buffer, rt_size_t size);
     rt_err_t (*ep0_send_status)(void);
     rt_err_t (*suspend)(void);
     rt_err_t (*wakeup)(void);