Messages in this thread Patch in this message | | | From | Chunfeng Yun <> | Subject | [PATCH v2 2/2] usb: xhci-mtk: fix bandwidth release issue | Date | Fri, 5 Aug 2022 14:03:28 +0800 |
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This happens when @udev->reset_resume is set to true, when usb resume, the flow as below: - hub_resume - usb_disable_interface - usb_disable_endpoint - usb_hcd_disable_endpoint - xhci_endpoint_disable // it set @ep->hcpriv to NULL
Then when reset usb device, it will drop allocated endpoints, the flow as below: - usb_reset_and_verify_device - usb_hcd_alloc_bandwidth - xhci_mtk_drop_ep
but @ep->hcpriv is already set to NULL, the bandwidth will be not released anymore.
Due to the added endponts are stored in hash table, we can drop the check of @ep->hcpriv.
Fixes: 4ce186665e7c ("usb: xhci-mtk: Do not use xhci's virt_dev in drop_endpoint") Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- v2: add comment --- drivers/usb/host/xhci-mtk-sch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index a17bc584ee99..579899eb24c1 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -764,8 +764,8 @@ int xhci_mtk_drop_ep(struct usb_hcd *hcd, struct usb_device *udev, if (ret) return ret; - if (ep->hcpriv) - drop_ep_quirk(hcd, udev, ep); + /* needn't check @ep->hcpriv, xhci_endpoint_disable set it NULL */ + drop_ep_quirk(hcd, udev, ep); return 0; } -- 2.18.0
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