Documentation: USB: fix example bulk-message timeout

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>
Link: https://lore.kernel.org/r/20211025115159.4954-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/driver-api/usb/writing_usb_driver.rst b/Documentation/driver-api/usb/writing_usb_driver.rst
index e09dac9..b43e1ce 100644 (file)
--- a/Documentation/driver-api/usb/writing_usb_driver.rst
+++ b/Documentation/driver-api/usb/writing_usb_driver.rst
@@ -234,7 +234,7 @@ 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))