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usb: xhci: fix interrupt transfer error happened on MTK platforms

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The MTK xHCI controller use some reserved bytes in endpoint context for
bandwidth scheduling, so need keep them in xhci_endpoint_copy();

The issue is introduced by:
commit f5249461b5 ("xhci: Clear the host side toggle manually when
endpoint is soft reset")
It resets endpoints and will drop bandwidth scheduling parameters used
by interrupt or isochronous endpoints on MTK xHCI controller.
Fixes: f5249461b5 ("xhci: Clear the host side toggle manually when
endpoint is soft reset")

Cc: stable@vger.kernel.org
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2018-09-07 15:29:12 +08:00 committed by Greg Kroah-Hartman
parent bfa150f37f
commit 0a3b53305c
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/host/xhci-mem.c
View file

@ -1613,6 +1613,10 @@ void xhci_endpoint_copy(struct xhci_hcd *xhci,
in_ep_ctx->ep_info2 = out_ep_ctx->ep_info2;
in_ep_ctx->deq = out_ep_ctx->deq;
in_ep_ctx->tx_info = out_ep_ctx->tx_info;
if (xhci->quirks & XHCI_MTK_HOST) {
in_ep_ctx->reserved[0] = out_ep_ctx->reserved[0];
in_ep_ctx->reserved[1] = out_ep_ctx->reserved[1];
}
}
/* Copy output xhci_slot_ctx to the input xhci_slot_ctx.