20 files changed, 232 insertions, 135 deletions
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index fd9b5424b860..d81d2fcbff18 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -230,7 +230,7 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 
 	switch (phy_mode) {
 	case FSL_USB2_PHY_ULPI:
-		if (pdata->controller_ver) {
+		if (pdata->have_sysif_regs && pdata->controller_ver) {
 			/* controller version 1.6 or above */
 			setbits32(non_ehci + FSL_SOC_USB_CTRL,
 					ULPI_PHY_CLK_SEL);
@@ -251,7 +251,7 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 		portsc |= PORT_PTS_PTW;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
-		if (pdata->controller_ver) {
+		if (pdata->have_sysif_regs && pdata->controller_ver) {
 			/* controller version 1.6 or above */
 			setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
 			mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
@@ -267,7 +267,8 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 		break;
 	}
 
-	if (pdata->controller_ver && (phy_mode == FSL_USB2_PHY_ULPI)) {
+	if (pdata->have_sysif_regs && pdata->controller_ver &&
+	    (phy_mode == FSL_USB2_PHY_ULPI)) {
 		/* check PHY_CLK_VALID to get phy clk valid */
 		if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
 				PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
@@ -278,7 +279,7 @@ static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 
 	ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 
-	if (phy_mode != FSL_USB2_PHY_ULPI)
+	if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
 		setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
 
 	return 0;
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index f7bfc0b898b9..3065809546b1 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -43,7 +43,7 @@ static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
 	unsigned int i;
 
 	for (i = 0; i < ehci_mv->clknum; i++)
-		clk_enable(ehci_mv->clk[i]);
+		clk_prepare_enable(ehci_mv->clk[i]);
 }
 
 static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
@@ -51,7 +51,7 @@ static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
 	unsigned int i;
 
 	for (i = 0; i < ehci_mv->clknum; i++)
-		clk_disable(ehci_mv->clk[i]);
+		clk_disable_unprepare(ehci_mv->clk[i]);
 }
 
 static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
@@ -302,7 +302,6 @@ static int mv_ehci_remove(struct platform_device *pdev)
 {
 	struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
 	struct usb_hcd *hcd = ehci_mv->hcd;
-	int clk_i;
 
 	if (hcd->rh_registered)
 		usb_remove_hcd(hcd);
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index ec7f5d2c90de..6b8c1584065f 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -94,7 +94,6 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
 	struct usb_hcd *hcd;
 	struct resource *res;
 	int irq, ret;
-	unsigned int flags;
 	struct ehci_mxc_priv *priv;
 	struct device *dev = &pdev->dev;
 	struct ehci_hcd *ehci;
@@ -205,25 +204,6 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_add;
 
-	if (pdata->otg) {
-		/*
-		 * efikamx and efikasb have some hardware bug which is
-		 * preventing usb to work unless CHRGVBUS is set.
-		 * It's in violation of USB specs
-		 */
-		if (machine_is_mx51_efikamx() || machine_is_mx51_efikasb()) {
-			flags = usb_phy_io_read(pdata->otg,
-							ULPI_OTG_CTRL);
-			flags |= ULPI_OTG_CTRL_CHRGVBUS;
-			ret = usb_phy_io_write(pdata->otg, flags,
-							ULPI_OTG_CTRL);
-			if (ret) {
-				dev_err(dev, "unable to set CHRVBUS\n");
-				goto err_add;
-			}
-		}
-	}
-
 	return 0;
 
 err_add:
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index a7d1f5b4c4ed..914a3ecfb5d3 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -325,7 +325,7 @@ static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 
 MODULE_ALIAS("platform:orion-ehci");
 
-static const struct of_device_id ehci_orion_dt_ids[] __devinitdata = {
+static const struct of_device_id ehci_orion_dt_ids[] = {
 	{ .compatible = "marvell,orion-ehci", },
 	{},
 };
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index dabb20494826..170b9399e09f 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -200,6 +200,26 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
 		break;
 	}
 
+	/* optional debug port, normally in the first BAR */
+	temp = pci_find_capability(pdev, PCI_CAP_ID_DBG);
+	if (temp) {
+		pci_read_config_dword(pdev, temp, &temp);
+		temp >>= 16;
+		if (((temp >> 13) & 7) == 1) {
+			u32 hcs_params = ehci_readl(ehci,
+						    &ehci->caps->hcs_params);
+
+			temp &= 0x1fff;
+			ehci->debug = hcd->regs + temp;
+			temp = ehci_readl(ehci, &ehci->debug->control);
+			ehci_info(ehci, "debug port %d%s\n",
+				  HCS_DEBUG_PORT(hcs_params),
+				  (temp & DBGP_ENABLED) ? " IN USE" : "");
+			if (!(temp & DBGP_ENABLED))
+				ehci->debug = NULL;
+		}
+	}
+
 	retval = ehci_setup(hcd);
 	if (retval)
 		return retval;
@@ -228,25 +248,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
 		break;
 	}
 
-	/* optional debug port, normally in the first BAR */
-	temp = pci_find_capability(pdev, 0x0a);
-	if (temp) {
-		pci_read_config_dword(pdev, temp, &temp);
-		temp >>= 16;
-		if ((temp & (3 << 13)) == (1 << 13)) {
-			temp &= 0x1fff;
-			ehci->debug = hcd->regs + temp;
-			temp = ehci_readl(ehci, &ehci->debug->control);
-			ehci_info(ehci, "debug port %d%s\n",
-				HCS_DEBUG_PORT(ehci->hcs_params),
-				(temp & DBGP_ENABLED)
-					? " IN USE"
-					: "");
-			if (!(temp & DBGP_ENABLED))
-				ehci->debug = NULL;
-		}
-	}
-
 	/* at least the Genesys GL880S needs fixup here */
 	temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
 	temp &= 0x0f;
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index d603e6ec19a5..20ebf6a8b7f4 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -305,7 +305,7 @@ static const struct dev_pm_ops s5p_ehci_pm_ops = {
 
 #ifdef CONFIG_OF
 static const struct of_device_id exynos_ehci_match[] = {
-	{ .compatible = "samsung,exynos-ehci" },
+	{ .compatible = "samsung,exynos4210-ehci" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, exynos_ehci_match);
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 5105127c1d4b..11e0b79ff9d5 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -142,6 +142,9 @@ static int usb_get_ver_info(struct device_node *np)
 			return ver;
 	}
 
+	if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
+		return FSL_USB_VER_OLD;
+
 	if (of_device_is_compatible(np, "fsl-usb2-mph")) {
 		if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
 			ver = FSL_USB_VER_1_6;
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index bd6a7447ccc9..f0ebe8e7c58b 100644
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -58,6 +58,7 @@
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
 #include <linux/dma-mapping.h>
+#include <linux/module.h>
 
 #include "imx21-hcd.h"
 
diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 1b3840980177..e3b7e85120e4 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -310,7 +310,7 @@ static const struct dev_pm_ops exynos_ohci_pm_ops = {
 
 #ifdef CONFIG_OF
 static const struct of_device_id exynos_ohci_match[] = {
-	{ .compatible = "samsung,exynos-ohci" },
+	{ .compatible = "samsung,exynos4210-ohci" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, exynos_ohci_match);
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 7482cfbe8c5e..88731b7c5f42 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -44,6 +44,7 @@ __acquires(ohci->lock)
 	// ASSERT (urb->hcpriv != 0);
 
 	urb_free_priv (ohci, urb->hcpriv);
+	urb->hcpriv = NULL;
 	if (likely(status == -EINPROGRESS))
 		status = 0;
 
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index d370245a4ee2..5e3a6deb62b1 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -128,7 +128,8 @@ static void tmio_start_hc(struct platform_device *dev)
 	tmio_iowrite8(2, tmio->ccr + CCR_INTC);
 
 	dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n",
-			tmio_ioread8(tmio->ccr + CCR_REVID), hcd->rsrc_start, hcd->irq);
+			tmio_ioread8(tmio->ccr + CCR_REVID),
+			(u64) hcd->rsrc_start, hcd->irq);
 }
 
 static int ohci_tmio_start(struct usb_hcd *hcd)
diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
index fc0b0daac93d..455737546525 100644
--- a/drivers/usb/host/uhci-debug.c
+++ b/drivers/usb/host/uhci-debug.c
@@ -16,6 +16,8 @@
 
 #include "uhci-hcd.h"
 
+#define EXTRA_SPACE	1024
+
 static struct dentry *uhci_debugfs_root;
 
 #ifdef DEBUG
@@ -44,10 +46,6 @@ static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
 	char *spid;
 	u32 status, token;
 
-	/* Try to make sure there's enough memory */
-	if (len < 160)
-		return 0;
-
 	status = td_status(uhci, td);
 	out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
 		hc32_to_cpu(uhci, td->link));
@@ -64,6 +62,8 @@ static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
 		(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
 		(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
 		status & 0x7ff);
+	if (out - buf > len)
+		goto done;
 
 	token = td_token(uhci, td);
 	switch (uhci_packetid(token)) {
@@ -90,6 +90,9 @@ static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
 		spid);
 	out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
 
+done:
+	if (out - buf > len)
+		out += sprintf(out, " ...\n");
 	return out - buf;
 }
 
@@ -101,8 +104,6 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
 	int i, nactive, ninactive;
 	char *ptype;
 
-	if (len < 200)
-		return 0;
 
 	out += sprintf(out, "urb_priv [%p] ", urbp);
 	out += sprintf(out, "urb [%p] ", urbp->urb);
@@ -110,6 +111,8 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
 	out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
 	out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
 			(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
+	if (out - buf > len)
+		goto done;
 
 	switch (usb_pipetype(urbp->urb->pipe)) {
 	case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
@@ -128,6 +131,9 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
 		out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
 	out += sprintf(out, "\n");
 
+	if (out - buf > len)
+		goto done;
+
 	i = nactive = ninactive = 0;
 	list_for_each_entry(td, &urbp->td_list, list) {
 		if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
@@ -135,6 +141,8 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
 			out += sprintf(out, "%*s%d: ", space + 2, "", i);
 			out += uhci_show_td(uhci, td, out,
 					len - (out - buf), 0);
+			if (out - buf > len)
+				goto tail;
 		} else {
 			if (td_status(uhci, td) & TD_CTRL_ACTIVE)
 				++nactive;
@@ -143,10 +151,13 @@ static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
 		}
 	}
 	if (nactive + ninactive > 0)
-		out += sprintf(out, "%*s[skipped %d inactive and %d active "
-				"TDs]\n",
+		out += sprintf(out,
+				"%*s[skipped %d inactive and %d active TDs]\n",
 				space, "", ninactive, nactive);
-
+done:
+	if (out - buf > len)
+		out += sprintf(out, " ...\n");
+tail:
 	return out - buf;
 }
 
@@ -158,10 +169,6 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 	__hc32 element = qh_element(qh);
 	char *qtype;
 
-	/* Try to make sure there's enough memory */
-	if (len < 80 * 7)
-		return 0;
-
 	switch (qh->type) {
 	case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
 	case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
@@ -175,13 +182,15 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 			hc32_to_cpu(uhci, qh->link),
 			hc32_to_cpu(uhci, element));
 	if (qh->type == USB_ENDPOINT_XFER_ISOC)
-		out += sprintf(out, "%*s    period %d phase %d load %d us, "
-				"frame %x desc [%p]\n",
+		out += sprintf(out,
+				"%*s    period %d phase %d load %d us, frame %x desc [%p]\n",
 				space, "", qh->period, qh->phase, qh->load,
 				qh->iso_frame, qh->iso_packet_desc);
 	else if (qh->type == USB_ENDPOINT_XFER_INT)
 		out += sprintf(out, "%*s    period %d phase %d load %d us\n",
 				space, "", qh->period, qh->phase, qh->load);
+	if (out - buf > len)
+		goto done;
 
 	if (element & UHCI_PTR_QH(uhci))
 		out += sprintf(out, "%*s  Element points to QH (bug?)\n", space, "");
@@ -195,11 +204,17 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 	if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
 		out += sprintf(out, "%*s  Element is NULL (bug?)\n", space, "");
 
+	if (out - buf > len)
+		goto done;
+
 	if (list_empty(&qh->queue)) {
 		out += sprintf(out, "%*s  queue is empty\n", space, "");
-		if (qh == uhci->skel_async_qh)
+		if (qh == uhci->skel_async_qh) {
 			out += uhci_show_td(uhci, uhci->term_td, out,
 					len - (out - buf), 0);
+			if (out - buf > len)
+				goto tail;
+		}
 	} else {
 		struct urb_priv *urbp = list_entry(qh->queue.next,
 				struct urb_priv, node);
@@ -211,9 +226,12 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 					space, "");
 		i = nurbs = 0;
 		list_for_each_entry(urbp, &qh->queue, node) {
-			if (++i <= 10)
+			if (++i <= 10) {
 				out += uhci_show_urbp(uhci, urbp, out,
 						len - (out - buf), space + 2);
+				if (out - buf > len)
+					goto tail;
+			}
 			else
 				++nurbs;
 		}
@@ -222,24 +240,27 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 					space, "", nurbs);
 	}
 
+	if (out - buf > len)
+		goto done;
+
 	if (qh->dummy_td) {
 		out += sprintf(out, "%*s  Dummy TD\n", space, "");
 		out += uhci_show_td(uhci, qh->dummy_td, out,
 				len - (out - buf), 0);
+		if (out - buf > len)
+			goto tail;
 	}
 
+done:
+	if (out - buf > len)
+		out += sprintf(out, " ...\n");
+tail:
 	return out - buf;
 }
 
-static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
+static int uhci_show_sc(int port, unsigned short status, char *buf)
 {
-	char *out = buf;
-
-	/* Try to make sure there's enough memory */
-	if (len < 160)
-		return 0;
-
-	out += sprintf(out, "  stat%d     =     %04x  %s%s%s%s%s%s%s%s%s%s\n",
+	return sprintf(buf, "  stat%d     =     %04x  %s%s%s%s%s%s%s%s%s%s\n",
 		port,
 		status,
 		(status & USBPORTSC_SUSP) ?	" Suspend" : "",
@@ -252,19 +273,12 @@ static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
 		(status & USBPORTSC_PE) ?	" Enabled" : "",
 		(status & USBPORTSC_CSC) ?	" ConnectChange" : "",
 		(status & USBPORTSC_CCS) ?	" Connected" : "");
-
-	return out - buf;
 }
 
-static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
+static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf)
 {
-	char *out = buf;
 	char *rh_state;
 
-	/* Try to make sure there's enough memory */
-	if (len < 60)
-		return 0;
-
 	switch (uhci->rh_state) {
 	    case UHCI_RH_RESET:
 		rh_state = "reset";		break;
@@ -283,9 +297,8 @@ static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
 	    default:
 		rh_state = "?";			break;
 	}
-	out += sprintf(out, "Root-hub state: %s   FSBR: %d\n",
+	return sprintf(buf, "Root-hub state: %s   FSBR: %d\n",
 			rh_state, uhci->fsbr_is_on);
-	return out - buf;
 }
 
 static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
@@ -296,9 +309,6 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
 	unsigned char sof;
 	unsigned short portsc1, portsc2;
 
-	/* Try to make sure there's enough memory */
-	if (len < 80 * 9)
-		return 0;
 
 	usbcmd    = uhci_readw(uhci, 0);
 	usbstat   = uhci_readw(uhci, 2);
@@ -319,6 +329,8 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
 		(usbcmd & USBCMD_GRESET) ?  "GRESET " : "",
 		(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
 		(usbcmd & USBCMD_RS) ?      "RS " : "");
+	if (out - buf > len)
+		goto done;
 
 	out += sprintf(out, "  usbstat   =     %04x   %s%s%s%s%s%s\n",
 		usbstat,
@@ -328,19 +340,33 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
 		(usbstat & USBSTS_RD) ?     "ResumeDetect " : "",
 		(usbstat & USBSTS_ERROR) ?  "USBError " : "",
 		(usbstat & USBSTS_USBINT) ? "USBINT " : "");
+	if (out - buf > len)
+		goto done;
 
 	out += sprintf(out, "  usbint    =     %04x\n", usbint);
 	out += sprintf(out, "  usbfrnum  =   (%d)%03x\n", (usbfrnum >> 10) & 1,
 		0xfff & (4*(unsigned int)usbfrnum));
 	out += sprintf(out, "  flbaseadd = %08x\n", flbaseadd);
 	out += sprintf(out, "  sof       =       %02x\n", sof);
-	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
-	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
-	out += sprintf(out, "Most recent frame: %x (%d)   "
-			"Last ISO frame: %x (%d)\n",
+	if (out - buf > len)
+		goto done;
+
+	out += uhci_show_sc(1, portsc1, out);
+	if (out - buf > len)
+		goto done;
+
+	out += uhci_show_sc(2, portsc2, out);
+	if (out - buf > len)
+		goto done;
+
+	out += sprintf(out,
+			"Most recent frame: %x (%d)   Last ISO frame: %x (%d)\n",
 			uhci->frame_number, uhci->frame_number & 1023,
 			uhci->last_iso_frame, uhci->last_iso_frame & 1023);
 
+done:
+	if (out - buf > len)
+		out += sprintf(out, " ...\n");
 	return out - buf;
 }
 
@@ -360,9 +386,13 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
 		"int8", "int4", "int2", "async", "term"
 	};
 
-	out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
+	out += uhci_show_root_hub_state(uhci, out);
+	if (out - buf > len)
+		goto done;
 	out += sprintf(out, "HC status\n");
 	out += uhci_show_status(uhci, out, len - (out - buf));
+	if (out - buf > len)
+		goto tail;
 
 	out += sprintf(out, "Periodic load table\n");
 	for (i = 0; i < MAX_PHASE; ++i) {
@@ -375,7 +405,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
 			uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
 			uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
 	if (debug <= 1)
-		return out - buf;
+		goto tail;
 
 	out += sprintf(out, "Frame List\n");
 	nframes = 10;
@@ -383,6 +413,8 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
 	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
 		__hc32 qh_dma;
 
+		if (out - buf > len)
+			goto done;
 		j = 0;
 		td = uhci->frame_cpu[i];
 		link = uhci->frame[i];
@@ -401,15 +433,20 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
 			td = list_entry(tmp, struct uhci_td, fl_list);
 			tmp = tmp->next;
 			if (link != LINK_TO_TD(uhci, td)) {
-				if (nframes > 0)
-					out += sprintf(out, "    link does "
-						"not match list entry!\n");
-				else
+				if (nframes > 0) {
+					out += sprintf(out,
+						"    link does not match list entry!\n");
+					if (out - buf > len)
+						goto done;
+				} else
 					++nerrs;
 			}
-			if (nframes > 0)
+			if (nframes > 0) {
 				out += uhci_show_td(uhci, td, out,
 						len - (out - buf), 4);
+				if (out - buf > len)
+					goto tail;
+			}
 			link = td->link;
 		} while (tmp != head);
 
@@ -423,9 +460,11 @@ check_link:
 						i, hc32_to_cpu(uhci, link));
 					j = 1;
 				}
-				out += sprintf(out, "   link does not match "
-					"QH (%08x)!\n",
+				out += sprintf(out,
+					"   link does not match QH (%08x)!\n",
 					hc32_to_cpu(uhci, qh_dma));
+				if (out - buf > len)
+					goto done;
 			} else
 				++nerrs;
 		}
@@ -436,18 +475,27 @@ check_link:
 
 	out += sprintf(out, "Skeleton QHs\n");
 
+	if (out - buf > len)
+		goto done;
+
 	fsbr_link = 0;
 	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
 		int cnt = 0;
 
 		qh = uhci->skelqh[i];
-		out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
+		out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
 		out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
+		if (out - buf > len)
+			goto tail;
 
 		/* Last QH is the Terminating QH, it's different */
 		if (i == SKEL_TERM) {
-			if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td))
-				out += sprintf(out, "    skel_term_qh element is not set to term_td!\n");
+			if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
+				out += sprintf(out,
+					"    skel_term_qh element is not set to term_td!\n");
+				if (out - buf > len)
+					goto done;
+			}
 			link = fsbr_link;
 			if (!link)
 				link = LINK_TO_QH(uhci, uhci->skel_term_qh);
@@ -460,9 +508,12 @@ check_link:
 		while (tmp != head) {
 			qh = list_entry(tmp, struct uhci_qh, node);
 			tmp = tmp->next;
-			if (++cnt <= 10)
+			if (++cnt <= 10) {
 				out += uhci_show_qh(uhci, qh, out,
 						len - (out - buf), 4);
+				if (out - buf > len)
+					goto tail;
+			}
 			if (!fsbr_link && qh->skel >= SKEL_FSBR)
 				fsbr_link = LINK_TO_QH(uhci, qh);
 		}
@@ -480,9 +531,17 @@ check_link:
 			link = LINK_TO_QH(uhci, uhci->skel_term_qh);
 check_qh_link:
 		if (qh->link != link)
-			out += sprintf(out, "    last QH not linked to next skeleton!\n");
+			out += sprintf(out,
+				"    last QH not linked to next skeleton!\n");
+
+		if (out - buf > len)
+			goto done;
 	}
 
+done:
+	if (out - buf > len)
+		out += sprintf(out, " ...\n");
+tail:
 	return out - buf;
 }
 
@@ -514,7 +573,8 @@ static int uhci_debug_open(struct inode *inode, struct file *file)
 	up->size = 0;
 	spin_lock_irqsave(&uhci->lock, flags);
 	if (uhci->is_initialized)
-		up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
+		up->size = uhci_sprint_schedule(uhci, up->data,
+					MAX_OUTPUT - EXTRA_SPACE);
 	spin_unlock_irqrestore(&uhci->lock, flags);
 
 	file->private_data = up;
@@ -529,7 +589,9 @@ static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
 
 	up = file->private_data;
 
-	/* XXX: atomic 64bit seek access, but that needs to be fixed in the VFS */
+	/*
+	 * XXX: atomic 64bit seek access, but that needs to be fixed in the VFS
+	 */
 	switch (whence) {
 	case 0:
 		new = off;
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 4b9e9aba2665..01628e39cc8b 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -449,21 +449,20 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
 
 	if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
 		if (status & USBSTS_HSE)
-			dev_err(uhci_dev(uhci), "host system error, "
-					"PCI problems?\n");
+			dev_err(uhci_dev(uhci),
+				"host system error, PCI problems?\n");
 		if (status & USBSTS_HCPE)
-			dev_err(uhci_dev(uhci), "host controller process "
-					"error, something bad happened!\n");
+			dev_err(uhci_dev(uhci),
+				"host controller process error, something bad happened!\n");
 		if (status & USBSTS_HCH) {
 			spin_lock(&uhci->lock);
 			if (uhci->rh_state >= UHCI_RH_RUNNING) {
 				dev_err(uhci_dev(uhci),
-					"host controller halted, "
-					"very bad!\n");
+					"host controller halted, very bad!\n");
 				if (debug > 1 && errbuf) {
 					/* Print the schedule for debugging */
-					uhci_sprint_schedule(uhci,
-							errbuf, ERRBUF_LEN);
+					uhci_sprint_schedule(uhci, errbuf,
+						ERRBUF_LEN - EXTRA_SPACE);
 					lprintk(errbuf);
 				}
 				uhci_hc_died(uhci);
@@ -589,8 +588,8 @@ static int uhci_start(struct usb_hcd *hcd)
 			UHCI_NUMFRAMES * sizeof(*uhci->frame),
 			&uhci->frame_dma_handle, 0);
 	if (!uhci->frame) {
-		dev_err(uhci_dev(uhci), "unable to allocate "
-				"consistent memory for frame list\n");
+		dev_err(uhci_dev(uhci),
+			"unable to allocate consistent memory for frame list\n");
 		goto err_alloc_frame;
 	}
 	memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
@@ -598,8 +597,8 @@ static int uhci_start(struct usb_hcd *hcd)
 	uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
 			GFP_KERNEL);
 	if (!uhci->frame_cpu) {
-		dev_err(uhci_dev(uhci), "unable to allocate "
-				"memory for frame pointers\n");
+		dev_err(uhci_dev(uhci),
+			"unable to allocate memory for frame pointers\n");
 		goto err_alloc_frame_cpu;
 	}
 
@@ -734,8 +733,8 @@ static int uhci_rh_suspend(struct usb_hcd *hcd)
 	 */
 	else if (hcd->self.root_hub->do_remote_wakeup &&
 			uhci->resuming_ports) {
-		dev_dbg(uhci_dev(uhci), "suspend failed because a port "
-				"is resuming\n");
+		dev_dbg(uhci_dev(uhci),
+			"suspend failed because a port is resuming\n");
 		rc = -EBUSY;
 	} else
 		suspend_rh(uhci, UHCI_RH_SUSPENDED);
@@ -826,8 +825,8 @@ static int uhci_count_ports(struct usb_hcd *hcd)
 
 	/* Anything greater than 7 is weird so we'll ignore it. */
 	if (port > UHCI_RH_MAXCHILD) {
-		dev_info(uhci_dev(uhci), "port count misdetected? "
-				"forcing to 2 ports\n");
+		dev_info(uhci_dev(uhci),
+			"port count misdetected? forcing to 2 ports\n");
 		port = 2;
 	}
 
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
index 7af2b7052047..6f986d82472d 100644
--- a/drivers/usb/host/uhci-hcd.h
+++ b/drivers/usb/host/uhci-hcd.h
@@ -212,10 +212,6 @@ struct uhci_qh {
 #define TD_CTRL_BITSTUFF	(1 << 17)	/* Bit Stuff Error */
 #define TD_CTRL_ACTLEN_MASK	0x7FF	/* actual length, encoded as n - 1 */
 
-#define TD_CTRL_ANY_ERROR	(TD_CTRL_STALLED | TD_CTRL_DBUFERR | \
-				 TD_CTRL_BABBLE | TD_CTRL_CRCTIME | \
-				 TD_CTRL_BITSTUFF)
-
 #define uhci_maxerr(err)		((err) << TD_CTRL_C_ERR_SHIFT)
 #define uhci_status_bits(ctrl_sts)	((ctrl_sts) & 0xF60000)
 #define uhci_actual_length(ctrl_sts)	(((ctrl_sts) + 1) & \
diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
index 768d54295a20..533b864f2e67 100644
--- a/drivers/usb/host/uhci-hub.c
+++ b/drivers/usb/host/uhci-hub.c
@@ -21,8 +21,8 @@ static const __u8 root_hub_hub_des[] =
 	0x00,			/*   (per-port OC, no power switching) */
 	0x01,			/*  __u8  bPwrOn2pwrGood; 2ms */
 	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
-	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max *** */
-	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
+	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max */
+	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max */
 };
 
 #define	UHCI_RH_MAXCHILD	7
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 15921fd55048..f0976d8190bc 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -1200,7 +1200,7 @@ static int uhci_result_common(struct uhci_hcd *uhci, struct urb *urb)
 				if (debug > 1 && errbuf) {
 					/* Print the chain for debugging */
 					uhci_show_qh(uhci, urbp->qh, errbuf,
-							ERRBUF_LEN, 0);
+						ERRBUF_LEN - EXTRA_SPACE, 0);
 					lprintk(errbuf);
 				}
 			}
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a686cf4905bb..68914429482f 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -761,12 +761,39 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			break;
 		case USB_PORT_FEAT_LINK_STATE:
 			temp = xhci_readl(xhci, port_array[wIndex]);
+
+			/* Disable port */
+			if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
+				xhci_dbg(xhci, "Disable port %d\n", wIndex);
+				temp = xhci_port_state_to_neutral(temp);
+				/*
+				 * Clear all change bits, so that we get a new
+				 * connection event.
+				 */
+				temp |= PORT_CSC | PORT_PEC | PORT_WRC |
+					PORT_OCC | PORT_RC | PORT_PLC |
+					PORT_CEC;
+				xhci_writel(xhci, temp | PORT_PE,
+					port_array[wIndex]);
+				temp = xhci_readl(xhci, port_array[wIndex]);
+				break;
+			}
+
+			/* Put link in RxDetect (enable port) */
+			if (link_state == USB_SS_PORT_LS_RX_DETECT) {
+				xhci_dbg(xhci, "Enable port %d\n", wIndex);
+				xhci_set_link_state(xhci, port_array, wIndex,
+						link_state);
+				temp = xhci_readl(xhci, port_array[wIndex]);
+				break;
+			}
+
 			/* Software should not attempt to set
-			 * port link state above '5' (Rx.Detect) and the port
+			 * port link state above '3' (U3) and the port
 			 * must be enabled.
 			 */
 			if ((temp & PORT_PE) == 0 ||
-				(link_state > USB_SS_PORT_LS_RX_DETECT)) {
+				(link_state > USB_SS_PORT_LS_U3)) {
 				xhci_warn(xhci, "Cannot set link state.\n");
 				goto error;
 			}
@@ -957,6 +984,7 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
 	int max_ports;
 	__le32 __iomem **port_array;
 	struct xhci_bus_state *bus_state;
+	bool reset_change = false;
 
 	max_ports = xhci_get_ports(hcd, &port_array);
 	bus_state = &xhci->bus_state[hcd_index(hcd)];
@@ -988,6 +1016,12 @@ int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
 			buf[(i + 1) / 8] |= 1 << (i + 1) % 8;
 			status = 1;
 		}
+		if ((temp & PORT_RC))
+			reset_change = true;
+	}
+	if (!status && !reset_change) {
+		xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
+		clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	}
 	spin_unlock_irqrestore(&xhci->lock, flags);
 	return status ? retval : 0;
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index fb51c7085ad0..35616ffbe3ae 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1250,6 +1250,8 @@ static unsigned int xhci_microframes_to_exponent(struct usb_device *udev,
 static unsigned int xhci_parse_microframe_interval(struct usb_device *udev,
 		struct usb_host_endpoint *ep)
 {
+	if (ep->desc.bInterval == 0)
+		return 0;
 	return xhci_microframes_to_exponent(udev, ep,
 			ep->desc.bInterval, 0, 15);
 }
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index cbb44b7b9d65..f69720983fc7 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1725,6 +1725,15 @@ cleanup:
 	if (bogus_port_status)
 		return;
 
+	/*
+	 * xHCI port-status-change events occur when the "or" of all the
+	 * status-change bits in the portsc register changes from 0 to 1.
+	 * New status changes won't cause an event if any other change
+	 * bits are still set.  When an event occurs, switch over to
+	 * polling to avoid losing status changes.
+	 */
+	xhci_dbg(xhci, "%s: starting port polling.\n", __func__);
+	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 	spin_unlock(&xhci->lock);
 	/* Pass this up to the core */
 	usb_hcd_poll_rh_status(hcd);
@@ -2697,13 +2706,11 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 	u32 status;
-	union xhci_trb *trb;
 	u64 temp_64;
 	union xhci_trb *event_ring_deq;
 	dma_addr_t deq;
 
 	spin_lock(&xhci->lock);
-	trb = xhci->event_ring->dequeue;
 	/* Check if the xHC generated the interrupt, or the irq is shared */
 	status = xhci_readl(xhci, &xhci->op_regs->status);
 	if (status == 0xffffffff)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 5c72c431bab1..f1f01a834ba7 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -884,6 +884,11 @@ int xhci_suspend(struct xhci_hcd *xhci)
 			xhci->shared_hcd->state != HC_STATE_SUSPENDED)
 		return -EINVAL;
 
+	/* Don't poll the roothubs on bus suspend. */
+	xhci_dbg(xhci, "%s: stopping port polling.\n", __func__);
+	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+	del_timer_sync(&hcd->rh_timer);
+
 	spin_lock_irq(&xhci->lock);
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags);
@@ -1069,6 +1074,11 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 	if (xhci->quirks & XHCI_COMP_MODE_QUIRK)
 		compliance_mode_recovery_timer_init(xhci);
 
+	/* Re-enable port polling. */
+	xhci_dbg(xhci, "%s: starting port polling.\n", __func__);
+	set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+	usb_hcd_poll_rh_status(hcd);
+
 	return retval;
 }
 #endif	/* CONFIG_PM */