This is a note to let you know that I've just added the patch titled usb: r8a66597-hcd: decrease timeout to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-r8a66597-hcd-decrease-timeout.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From dd14a3e9b92ac6f0918054f9e3477438760a4fa6 Mon Sep 17 00:00:00 2001 From: Chris Brandt <chris.brandt@xxxxxxxxxxx> Date: Thu, 27 Apr 2017 12:12:49 -0700 Subject: usb: r8a66597-hcd: decrease timeout From: Chris Brandt <chris.brandt@xxxxxxxxxxx> commit dd14a3e9b92ac6f0918054f9e3477438760a4fa6 upstream. The timeout for BULK packets was 300ms which is a long time if other endpoints or devices are waiting for their turn. Changing it to 50ms greatly increased the overall performance for multi-endpoint devices. Fixes: 5d3043586db4 ("usb: r8a66597-hcd: host controller driver for R8A6659") Signed-off-by: Chris Brandt <chris.brandt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/host/r8a66597-hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -1269,7 +1269,7 @@ static void set_td_timer(struct r8a66597 time = 30; break; default: - time = 300; + time = 50; break; } Patches currently in stable-queue which might be from chris.brandt@xxxxxxxxxxx are queue-4.4/usb-r8a66597-hcd-decrease-timeout.patch queue-4.4/usb-r8a66597-hcd-select-a-different-endpoint-on-timeout.patch