From: Weitao Wang WeitaoWang-oc@zhaoxin.com
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@rowland.harvard.edu Cc: stable@vger.kernel.org Signed-off-by: Weitao Wang WeitaoWang-oc@zhaoxin.com Acked-by: Alan Stern stern@rowland.harvard.edu Link: https://lore.kernel.org/r/20230423105952.4526-1-WeitaoWang-oc@zhaoxin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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. */