linux-kernel - [PATCH 3.12 102/142] usb: host: ehci: use new USB_RESUME

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Date:	Sat, 16 May 2015 09:37:42 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 102/142] usb: host: ehci: use new USB_RESUME_TIMEOUT

From: Felipe Balbi <balbi@...com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit ea16328f80ca8d74434352157f37ef60e2f55ce2 upstream.

Make sure we're using the new macro, so our
resume signaling will always pass certification.

Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/usb/host/ehci-hcd.c | 10 +++++-----
 drivers/usb/host/ehci-hub.c |  9 ++++++---
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 51b1f4e18c0d..9b27c65c7bb6 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -791,12 +791,12 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd)
 					ehci->reset_done[i] == 0))
 				continue;
 
-			/* start 20 msec resume signaling from this port,
-			 * and make khubd collect PORT_STAT_C_SUSPEND to
-			 * stop that signaling.  Use 5 ms extra for safety,
-			 * like usb_port_resume() does.
+			/* start USB_RESUME_TIMEOUT msec resume signaling from
+			 * this port, and make hub_wq collect
+			 * PORT_STAT_C_SUSPEND to stop that signaling.
 			 */
-			ehci->reset_done[i] = jiffies + msecs_to_jiffies(25);
+			ehci->reset_done[i] = jiffies +
+				msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			set_bit(i, &ehci->resuming_ports);
 			ehci_dbg (ehci, "port %d remote wakeup\n", i + 1);
 			usb_hcd_start_port_resume(&hcd->self, i);
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 7ba861543d03..68a06b2f505a 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -482,10 +482,13 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
 		ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
 	}
 
-	/* msleep for 20ms only if code is trying to resume port */
+	/*
+	 * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
+	 * port
+	 */
 	if (resume_needed) {
 		spin_unlock_irq(&ehci->lock);
-		msleep(20);
+		msleep(USB_RESUME_TIMEOUT);
 		spin_lock_irq(&ehci->lock);
 		if (ehci->shutdown)
 			goto shutdown;
@@ -953,7 +956,7 @@ static int ehci_hub_control (
 			temp &= ~PORT_WAKE_BITS;
 			ehci_writel(ehci, temp | PORT_RESUME, status_reg);
 			ehci->reset_done[wIndex] = jiffies
-					+ msecs_to_jiffies(20);
+					+ msecs_to_jiffies(USB_RESUME_TIMEOUT);
 			set_bit(wIndex, &ehci->resuming_ports);
 			usb_hcd_start_port_resume(&hcd->self, wIndex);
 			break;
-- 
2.3.7

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