xhci: Bug fixes for 3.12.

Hi Greg,
 
 Here's three low-priority bug fixes that should be queued for 3.12.
 They disable runtime PM for hosts that need the XHCI_RESET_ON_RESUME
 quirk, fix USB 2.0 Link PM on hosts that don't have BESL support, and
 prevent a bunch of log spam.
 
 Please pull into usb-next for 3.12.
 
 Sarah Sharp
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Merge tag 'for-usb-next-2013-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-next

Sarah writes:

xhci: Bug fixes for 3.12.

Hi Greg,

Here's three low-priority bug fixes that should be queued for 3.12.
They disable runtime PM for hosts that need the XHCI_RESET_ON_RESUME
quirk, fix USB 2.0 Link PM on hosts that don't have BESL support, and
prevent a bunch of log spam.

Please pull into usb-next for 3.12.

Sarah Sharp

drivers/usb/host/xhci-ext-caps.h

@@ -71,7 +71,7 @@
 
 /* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */
 #define XHCI_HLC               (1 << 19)
-#define XHCI_BLC               (1 << 19)
+#define XHCI_BLC               (1 << 20)
 
 /* command register values to disable interrupts and halt the HC */
 /* start/stop HC execution - do not write unless HC is halted*/

drivers/usb/host/xhci-ring.c

@@ -3087,14 +3087,10 @@ int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	 * to set the polling interval (once the API is added).
 	 */
 	if (xhci_interval != ep_interval) {
-		if (printk_ratelimit())
+		dev_dbg_ratelimited(&urb->dev->dev,
-			dev_dbg(&urb->dev->dev, "Driver uses different interval"
+				"Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n",
-					" (%d microframe%s) than xHCI "
+				ep_interval, ep_interval == 1 ? "" : "s",
-					"(%d microframe%s)\n",
+				xhci_interval, xhci_interval == 1 ? "" : "s");
-					ep_interval,
-					ep_interval == 1 ? "" : "s",
-					xhci_interval,
-					xhci_interval == 1 ? "" : "s");
 		urb->interval = xhci_interval;
 		/* Convert back to frames for LS/FS devices */
 		if (urb->dev->speed == USB_SPEED_LOW ||
@@ -3876,14 +3872,10 @@ int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
 	 * to set the polling interval (once the API is added).
 	 */
 	if (xhci_interval != ep_interval) {
-		if (printk_ratelimit())
+		dev_dbg_ratelimited(&urb->dev->dev,
-			dev_dbg(&urb->dev->dev, "Driver uses different interval"
+				"Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n",
-					" (%d microframe%s) than xHCI "
+				ep_interval, ep_interval == 1 ? "" : "s",
-					"(%d microframe%s)\n",
+				xhci_interval, xhci_interval == 1 ? "" : "s");
-					ep_interval,
-					ep_interval == 1 ? "" : "s",
-					xhci_interval,
-					xhci_interval == 1 ? "" : "s");
 		urb->interval = xhci_interval;
 		/* Convert back to frames for LS/FS devices */
 		if (urb->dev->speed == USB_SPEED_LOW ||

drivers/usb/host/xhci.c

@@ -3557,10 +3557,21 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 	struct xhci_virt_device *virt_dev;
+	struct device *dev = hcd->self.controller;
 	unsigned long flags;
 	u32 state;
 	int i, ret;
 
+#ifndef CONFIG_USB_DEFAULT_PERSIST
+	/*
+	 * We called pm_runtime_get_noresume when the device was attached.
+	 * Decrement the counter here to allow controller to runtime suspend
+	 * if no devices remain.
+	 */
+	if (xhci->quirks & XHCI_RESET_ON_RESUME)
+		pm_runtime_put_noidle(dev);
+#endif
+
 	ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
 	/* If the host is halted due to driver unload, we still need to free the
 	 * device.
@@ -3634,6 +3645,7 @@ static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci)
 int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	struct device *dev = hcd->self.controller;
 	unsigned long flags;
 	int timeleft;
 	int ret;
@@ -3686,6 +3698,16 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
 		goto disable_slot;
 	}
 	udev->slot_id = xhci->slot_id;
+
+#ifndef CONFIG_USB_DEFAULT_PERSIST
+	/*
+	 * If resetting upon resume, we can't put the controller into runtime
+	 * suspend if there is a device attached.
+	 */
+	if (xhci->quirks & XHCI_RESET_ON_RESUME)
+		pm_runtime_get_noresume(dev);
+#endif
+
 	/* Is this a LS or FS device under a HS hub? */
 	/* Hub or peripherial? */
 	return 1;