This is a note to let you know that I've just added the patch titled
xhci: Set HCD flag to defer primary roothub registration
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-set-hcd-flag-to-defer-primary-roothub-registration.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b7a0a792f864583207c593b50fd1b752ed89f4c1 Mon Sep 17 00:00:00 2001
From: Kishon Vijay Abraham I <kishon@xxxxxx>
Date: Thu, 9 Sep 2021 12:11:59 +0530
Subject: xhci: Set HCD flag to defer primary roothub registration
From: Kishon Vijay Abraham I <kishon@xxxxxx>
commit b7a0a792f864583207c593b50fd1b752ed89f4c1 upstream.
Set "HCD_FLAG_DEFER_RH_REGISTER" to hcd->flags in xhci_run() to defer
registering primary roothub in usb_add_hcd(). This will make sure both
primary roothub and secondary roothub will be registered along with the
second HCD. This is required for cold plugged USB devices to be detected
in certain PCIe USB cards (like Inateck USB card connected to AM64 EVM
or J7200 EVM).
CC: stable@xxxxxxxxxxxxxxx # 5.4+
Suggested-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Tested-by: Chris Chiu <chris.chiu@xxxxxxxxxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Link: https://lore.kernel.org/r/20210909064200.16216-3-kishon@xxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -693,6 +693,7 @@ int xhci_run(struct usb_hcd *hcd)
if (ret)
xhci_free_command(xhci, command);
}
+ set_bit(HCD_FLAG_DEFER_RH_REGISTER, &hcd->flags);
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"Finished xhci_run for USB2 roothub");
Patches currently in stable-queue which might be from kishon@xxxxxx are
queue-5.10/xhci-set-hcd-flag-to-defer-primary-roothub-registration.patch
queue-5.10/usb-core-hcd-add-support-for-deferring-roothub-registration.patch
