4.18-stable review patch. If anyone has any objections, please let me know.
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From: Chunfeng Yun chunfeng.yun@mediatek.com
commit 0a3b53305c8ff427bbc1d9d5bd78524007f19600 upstream.
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 f5249461b504 ("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: f5249461b504 ("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
--- drivers/usb/host/xhci-mem.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1613,6 +1613,10 @@ void xhci_endpoint_copy(struct xhci_hcd 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.