From: Chunfeng Yun chunfeng.yun@mediatek.com
commit 5ce1a24dd98c00a57a8fa13660648abf7e08e3ef upstream.
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(+)
--- 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_ 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; }