UBUNTU: SAUCE: xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime...

BugLink: https://bugs.launchpad.net/bugs/1954369
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.

Link: https://lore.kernel.org/linux-usb/20211119092628.677935-1-kai.heng.feng@canonical.com/
[Maintainer said the code is in his repo but I can't find it. Probably
went to vacation]
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 902f410874e8eac93552b3821dc02dc0dad3f41f..af92a9f8ed670fef55367802dc010542d7d009d8 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3934,7 +3934,6 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
        struct xhci_slot_ctx *slot_ctx;
        int i, ret;
 
-#ifndef CONFIG_USB_DEFAULT_PERSIST
        /*
         * We called pm_runtime_get_noresume when the device was attached.
         * Decrement the counter here to allow controller to runtime suspend
@@ -3942,7 +3941,6 @@ static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
         */
        if (xhci->quirks & XHCI_RESET_ON_RESUME)
                pm_runtime_put_noidle(hcd->self.controller);
-#endif
 
        ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
        /* If the host is halted due to driver unload, we still need to free the
@@ -4094,14 +4092,12 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
 
        xhci_debugfs_create_slot(xhci, slot_id);
 
-#ifndef CONFIG_USB_DEFAULT_PERSIST
        /*
         * If resetting upon resume, we can't put the controller into runtime
         * suspend if there is a device attached.
         */
        if (xhci->quirks & XHCI_RESET_ON_RESUME)
                pm_runtime_get_noresume(hcd->self.controller);
-#endif
 
        /* Is this a LS or FS device under a HS hub? */
        /* Hub or peripherial? */