diff mbox series

[v4,2/3] xhci: Set HCD flag to defer primary roothub registration

Message ID 20210909064200.16216-3-kishon@ti.com (mailing list archive)
State Accepted
Commit b7a0a792f864583207c593b50fd1b752ed89f4c1
Headers show
Series Fix cold plugged USB device on certain PCIe USB cards | expand

Commit Message

Kishon Vijay Abraham I Sept. 9, 2021, 6:41 a.m. UTC 
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@vger.kernel.org # 5.4+
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Suggested-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Tested-by: Chris Chiu <chris.chiu@canonical.com>
---
 drivers/usb/host/xhci.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3618070eba78..7176058c7f3e 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -692,6 +692,7 @@  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");