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 --- V2: add Fixes suggested by Nicolas --- 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 fea5555..45c54d56 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; }