From: Boris Todorov <boris.st.todorov@gmail.com>
Date: Mon, 11 Jul 2011 09:03:33 +0000 (+0300)
Subject: USB: EHCI: Fix test mode sequence
X-Git-Tag: firefly_0821_release~7541^2~2399
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=00c37d53fdc0f671cc07228e0faf1938da741e68;p=firefly-linux-kernel-4.4.55.git

USB: EHCI: Fix test mode sequence

commit 77636c86a600b83de01719efad83567e46d7e8ce upstream.

The sequence to put port in test mode is not complete.
According EHCI specification all enabled ports must be
put in suspend.

Signed-off-by: Boris Todorov <boris.st.todorov@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 0f3a72480084..f5d7fed4a4c0 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -1120,7 +1120,19 @@ static int ehci_hub_control (
 			if (!selector || selector > 5)
 				goto error;
 			ehci_quiesce(ehci);
+
+			/* Put all enabled ports into suspend */
+			while (ports--) {
+				u32 __iomem *sreg =
+						&ehci->regs->port_status[ports];
+
+				temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
+				if (temp & PORT_PE)
+					ehci_writel(ehci, temp | PORT_SUSPEND,
+							sreg);
+			}
 			ehci_halt(ehci);
+			temp = ehci_readl(ehci, status_reg);
 			temp |= selector << 16;
 			ehci_writel(ehci, temp, status_reg);
 			break;