This is a note to let you know that I've just added the patch titled

usb: xhci-mtk: fix the failure of bandwidth allocation

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 5ce1a24dd98c00a57a8fa13660648abf7e08e3ef Mon Sep 17 00:00:00 2001

From: Chunfeng Yun chunfeng.yun@mediatek.com Date: Fri, 10 Jul 2020 13:57:52 +0800 Subject: usb: xhci-mtk: fix the failure of bandwidth allocation

The wMaxPacketSize field of endpoint descriptor may be zero as default value in alternate interface, and they are not actually selected when start stream, so skip them when try to allocate bandwidth.

Cc: stable stable@vger.kernel.org Fixes: 0cbd4b34cda9 ("xhci: mediatek: support MTK xHCI host controller") Signed-off-by: Chunfeng Yun chunfeng.yun@mediatek.com Link: https://lore.kernel.org/r/1594360672-2076-1-git-send-email-chunfeng.yun@medi... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-mtk-sch.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index fea555570ad4..45c54d56ecbd 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -557,6 +557,10 @@ static bool need_bw_sch(struct usb_host_endpoint *ep, if (is_fs_or_ls(speed) && !has_tt) return false;

+ /* skip endpoint with zero maxpkt */ + if (usb_endpoint_maxp(&ep->desc) == 0) + return false; + return true; }