wusbcore: reduce keepalive threshold from timeout/2 to timeout/3
This patch reduces the keepalive threshold of WUSB host controllers from
timeout/2 to timeout/3. The keepalive timer fires every timeout/2 ms, but
due to rounding errors and jitter, the host may decide not to send a
keepalive at timeout/2. By the time the next timer fires, a full timeout
period may have expired causing the device to be disconnected without ever
having been sent a keepalive. Changing the keepalive threshold to
timeout/3 ensures that at least one keepalive will be sent before a device
is disconnected. The patch also updates the code to use msecs_to_jiffies
consistently.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 files changed