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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2018-09-07 09:29:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-10 20:40:29 +0200 |
| commit | 0a3b53305c8ff427bbc1d9d5bd78524007f19600 (patch) | |
| tree | c41e7b95a0e7a1a7134f27c5d858d567baf9564c | |
| parent | Merge tag 'fixes-for-v4.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/... (diff) | |
| download | linux-0a3b53305c8ff427bbc1d9d5bd78524007f19600.tar.xz linux-0a3b53305c8ff427bbc1d9d5bd78524007f19600.zip | |
usb: xhci: fix interrupt transfer error happened on MTK platforms
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>
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index ef350c33dc4a..b1f27aa38b10 100644 --- 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 *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. |