Commit 5ce1a24d authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman

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: 0cbd4b34 ("xhci: mediatek: support MTK xHCI host controller")
Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1594360672-2076-1-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba47d845
...@@ -557,6 +557,10 @@ static bool need_bw_sch(struct usb_host_endpoint *ep, ...@@ -557,6 +557,10 @@ static bool need_bw_sch(struct usb_host_endpoint *ep,
if (is_fs_or_ls(speed) && !has_tt) if (is_fs_or_ls(speed) && !has_tt)
return false; return false;
/* skip endpoint with zero maxpkt */
if (usb_endpoint_maxp(&ep->desc) == 0)
return false;
return true; return true;
} }
......
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