[PATCH 6.3 292/364] USB: UHCI: adjust zhaoxin UHCI controllers OverCurrent bit value

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From: Weitao Wang <WeitaoWang-oc@xxxxxxxxxxx>

commit dddb342b5b9e482bb213aecc08cbdb201ea4f8da upstream.

OverCurrent condition is not standardized in the UHCI spec.
Zhaoxin UHCI controllers report OverCurrent bit active off.
In order to handle OverCurrent condition correctly, the uhci-hcd
driver needs to be told to expect the active-off behavior.

Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Weitao Wang <WeitaoWang-oc@xxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230423105952.4526-1-WeitaoWang-oc@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/host/uhci-pci.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/drivers/usb/host/uhci-pci.c
+++ b/drivers/usb/host/uhci-pci.c
@@ -119,11 +119,13 @@ static int uhci_pci_init(struct usb_hcd
 
 	uhci->rh_numports = uhci_count_ports(hcd);
 
-	/* Intel controllers report the OverCurrent bit active on.
-	 * VIA controllers report it active off, so we'll adjust the
-	 * bit value.  (It's not standardized in the UHCI spec.)
+	/*
+	 * Intel controllers report the OverCurrent bit active on.  VIA
+	 * and ZHAOXIN controllers report it active off, so we'll adjust
+	 * the bit value.  (It's not standardized in the UHCI spec.)
 	 */
-	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
+	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA ||
+			to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_ZHAOXIN)
 		uhci->oc_low = 1;
 
 	/* HP's server management chip requires a longer port reset delay. */





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