From: Alan Stern Date: Fri, 4 May 2007 15:55:31 +0000 (-0400) Subject: USB: EHCI: fix handover for designated full-speed ports X-Git-Tag: firefly_0821_release~28279^2~125 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3c519b846c4d5edf7c94d1eede42445a815bf65c;p=firefly-linux-kernel-4.4.55.git USB: EHCI: fix handover for designated full-speed ports This patch (as895) fixes up a loose end in the port-handover code for the USB-Persist facility. A special case occurs when a high-speed device is attached to a port which the user has designated to run at full-speed only; the port must be disabled before the handover can take place. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 3e80de7c7f5b..27291f502651 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -60,11 +60,13 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci) while (port--) { if (test_bit(port, &ehci->owned_ports)) { reg = &ehci->regs->port_status[port]; - status = ehci_readl(ehci, reg); + status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; /* Port already owned by companion? */ if (status & PORT_OWNER) clear_bit(port, &ehci->owned_ports); + else if (test_bit(port, &ehci->companion_ports)) + ehci_writel(ehci, status & ~PORT_PE, reg); else ehci_hub_control(hcd, SetPortFeature, USB_PORT_FEAT_RESET, port + 1,