usb: xhci-mtk: fix the failure of bandwidth allocation
commit5.4-rM2-2.2.x-imx-squashed5ce1a24dd9
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:0cbd4b34cd
("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@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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93f1e16af4
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1d91547f2f
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@ -557,6 +557,10 @@ static bool need_bw_sch(struct usb_host_endpoint *ep,
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if (is_fs_or_ls(speed) && !has_tt)
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return false;
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/* skip endpoint with zero maxpkt */
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if (usb_endpoint_maxp(&ep->desc) == 0)
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return false;
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return true;
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}
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