# \[PATCH 1/2\] Documentation: USB: fix example bulk-message timeout

- From: Johan Hovold \<johan@kernel.org\>
- Date: 2021-10-25 11:52:34 
- List: linux-usb
- Page: https://ratatoskr.run/linux-usb/2021/10/1552400
- Thread: https://ratatoskr.run/linux-doc/2021/10/1552401/t.md

```text
USB bulk-message timeouts are specified in milliseconds and should
specifically not vary with CONFIG_HZ.

Use a fixed five-second timeout in the "Writing USB Device Drivers"
example.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 Documentation/driver-api/usb/writing_usb_driver.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/driver-api/usb/writing_usb_driver.rst b/Documentation/driver-api/usb/writing_usb_driver.rst
index 2176297e5765..4356f023065b 100644
--- a/Documentation/driver-api/usb/writing_usb_driver.rst
+++ b/Documentation/driver-api/usb/writing_usb_driver.rst
@@ -231,7 +231,7 @@ error message. This can be shown with the following code::
 			   skel->bulk_in_endpointAddr),
 			   skel->bulk_in_buffer,
 			   skel->bulk_in_size,
-			   &count, HZ*10);
+			   &count, 5000);
     /* if the read was successful, copy the data to user space */
     if (!retval) {
 	    if (copy_to_user (buffer, skel->bulk_in_buffer, count))
-- 
2.32.0

```
