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xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending
commit 811ae81320
upstream.
When the xHCI is quirked with XHCI_RESET_ON_RESUME, runtime resume
routine also resets the controller.
This is bad for USB drivers without reset_resume callback, because
there's no subsequent call of usb_dev_complete() ->
usb_resume_complete() to force rebinding the driver to the device. For
instance, btusb device stops working after xHCI controller is runtime
resumed, if the controlled is quirked with XHCI_RESET_ON_RESUME.
So always take XHCI_RESET_ON_RESUME into account to solve the issue.
Cc: <stable@vger.kernel.org>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211210141735.1384209-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 0 additions and 4 deletions
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@ -3893,7 +3893,6 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
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struct xhci_slot_ctx *slot_ctx;
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int i, ret;
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#ifndef CONFIG_USB_DEFAULT_PERSIST
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/*
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* We called pm_runtime_get_noresume when the device was attached.
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* Decrement the counter here to allow controller to runtime suspend
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@ -3901,7 +3900,6 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
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*/
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if (xhci->quirks & XHCI_RESET_ON_RESUME)
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pm_runtime_put_noidle(hcd->self.controller);
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#endif
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ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
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/* If the host is halted due to driver unload, we still need to free the
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@ -4053,14 +4051,12 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
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xhci_debugfs_create_slot(xhci, slot_id);
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#ifndef CONFIG_USB_DEFAULT_PERSIST
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/*
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* If resetting upon resume, we can't put the controller into runtime
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* suspend if there is a device attached.
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*/
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if (xhci->quirks & XHCI_RESET_ON_RESUME)
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pm_runtime_get_noresume(hcd->self.controller);
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#endif
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/* Is this a LS or FS device under a HS hub? */
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/* Hub or peripherial? */
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