Commit 5ce1a24d authored Jul 10, 2020 by Chunfeng Yun Committed by Greg Kroah-Hartman Jul 21, 2020

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: 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>

parent ba47d845

drivers/usb/host/xhci-mtk-sch.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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