Merge branch 'master'

12 files changed, 149 insertions, 34 deletions

diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index 79861ee12a2..9d59dc62e6d 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -787,6 +787,9 @@ static const struct usb_device_id cxacru_usb_ids[] = {
 	{ /* V = Conexant			P = ADSL modem (Hasbani project)	*/
 		USB_DEVICE(0x0572, 0xcb00),	.driver_info = (unsigned long) &cxacru_cb00
 	},
+	{ /* V = Conexant             P = ADSL modem (Well PTI-800 */
+		USB_DEVICE(0x0572, 0xcb02),	.driver_info = (unsigned long) &cxacru_cb00
+	},
 	{ /* V = Conexant			P = ADSL modem				*/
 		USB_DEVICE(0x0572, 0xcb01),	.driver_info = (unsigned long) &cxacru_cb00
 	},
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index c466739428b..2e6593e6c1b 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -879,7 +879,7 @@ static int usbatm_atm_init(struct usbatm_data *instance)
 
  fail:
 	instance->atm_dev = NULL;
-	shutdown_atm_dev(atm_dev); /* usbatm_atm_dev_close will eventually be called */
+	atm_dev_deregister(atm_dev); /* usbatm_atm_dev_close will eventually be called */
 	return ret;
 }
 
@@ -1164,7 +1164,7 @@ void usbatm_usb_disconnect(struct usb_interface *intf)
 
 	/* ATM finalize */
 	if (instance->atm_dev)
-		shutdown_atm_dev(instance->atm_dev);
+		atm_dev_deregister(instance->atm_dev);
 
 	usbatm_put_instance(instance);	/* taken in usbatm_usb_probe */
 }
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 5131d88e8c5..29b5b2a6e18 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -219,6 +219,7 @@ int usb_hcd_pci_suspend (struct pci_dev *dev, pm_message_t message)
 			goto done;
 		}
 	}
+	synchronize_irq(dev->irq);
 
 	/* FIXME until the generic PM interfaces change a lot more, this
 	 * can't use PCI D1 and D2 states.  For example, the confusion
@@ -392,7 +393,7 @@ int usb_hcd_pci_resume (struct pci_dev *dev)
 
 	dev->dev.power.power_state = PMSG_ON;
 
-	hcd->saw_irq = 0;
+	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
 
 	if (hcd->driver->resume) {
 		retval = hcd->driver->resume(hcd);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 5e5f65a475a..da24c31ee00 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1315,11 +1315,12 @@ static int hcd_unlink_urb (struct urb *urb, int status)
 	 * finish unlinking the initial failed usb_set_address()
 	 * or device descriptor fetch.
 	 */
-	if (!hcd->saw_irq && hcd->self.root_hub != urb->dev) {
+	if (!test_bit(HCD_FLAG_SAW_IRQ, &hcd->flags)
+	    && hcd->self.root_hub != urb->dev) {
 		dev_warn (hcd->self.controller, "Unlink after no-IRQ?  "
 			"Controller is probably using the wrong IRQ."
 			"\n");
-		hcd->saw_irq = 1;
+		set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
 	}
 
 	urb->status = status;
@@ -1649,13 +1650,15 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r)
 	struct usb_hcd		*hcd = __hcd;
 	int			start = hcd->state;
 
-	if (start == HC_STATE_HALT)
+	if (unlikely(start == HC_STATE_HALT ||
+	    !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
 		return IRQ_NONE;
 	if (hcd->driver->irq (hcd, r) == IRQ_NONE)
 		return IRQ_NONE;
 
-	hcd->saw_irq = 1;
-	if (hcd->state == HC_STATE_HALT)
+	set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+
+	if (unlikely(hcd->state == HC_STATE_HALT))
 		usb_hc_died (hcd);
 	return IRQ_HANDLED;
 }
@@ -1768,6 +1771,8 @@ int usb_add_hcd(struct usb_hcd *hcd,
 
 	dev_info(hcd->self.controller, "%s\n", hcd->product_desc);
 
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
 	/* till now HC has been in an indeterminate state ... */
 	if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) {
 		dev_err(hcd->self.controller, "can't reset\n");
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 24a62a2ff86..c8a1b350e2c 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -72,7 +72,12 @@ struct usb_hcd {	/* usb_bus.hcpriv points to this */
 	 * hardware info/state
 	 */
 	const struct hc_driver	*driver;	/* hw-specific hooks */
-	unsigned		saw_irq : 1;
+
+	/* Flags that need to be manipulated atomically */
+	unsigned long		flags;
+#define HCD_FLAG_HW_ACCESSIBLE	0x00000001
+#define HCD_FLAG_SAW_IRQ	0x00000002
+
 	unsigned		can_wakeup:1;	/* hw supports wakeup? */
 	unsigned		remote_wakeup:1;/* sw should use wakeup? */
 	unsigned		rh_registered:1;/* is root hub registered? */
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 441c26064b4..13f73a836e4 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -121,8 +121,8 @@ static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
 	return 0;
 }
 
-/* called by khubd or root hub (re)init threads; leaves HC in halt state */
-static int ehci_pci_reset(struct usb_hcd *hcd)
+/* called during probe() after chip reset completes */
+static int ehci_pci_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
 	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
@@ -141,6 +141,11 @@ static int ehci_pci_reset(struct usb_hcd *hcd)
 	if (retval)
 		return retval;
 
+	/* data structure init */
+	retval = ehci_init(hcd);
+	if (retval)
+		return retval;
+
 	/* NOTE:  only the parts below this line are PCI-specific */
 
 	switch (pdev->vendor) {
@@ -154,7 +159,8 @@ static int ehci_pci_reset(struct usb_hcd *hcd)
 		/* AMD8111 EHCI doesn't work, according to AMD errata */
 		if (pdev->device == 0x7463) {
 			ehci_info(ehci, "ignoring AMD8111 (errata)\n");
-			return -EIO;
+			retval = -EIO;
+			goto done;
 		}
 		break;
 	case PCI_VENDOR_ID_NVIDIA:
@@ -207,9 +213,8 @@ static int ehci_pci_reset(struct usb_hcd *hcd)
 	/* REVISIT:  per-port wake capability (PCI 0x62) currently unused */
 
 	retval = ehci_pci_reinit(ehci, pdev);
-
-	/* finish init */
-	return ehci_init(hcd);
+done:
+	return retval;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -228,14 +233,36 @@ static int ehci_pci_reset(struct usb_hcd *hcd)
 static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
 {
 	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
+	unsigned long		flags;
+	int			rc = 0;
 
 	if (time_before(jiffies, ehci->next_statechange))
 		msleep(10);
 
+	/* Root hub was already suspended. Disable irq emission and
+	 * mark HW unaccessible, bail out if RH has been resumed. Use
+	 * the spinlock to properly synchronize with possible pending
+	 * RH suspend or resume activity.
+	 *
+	 * This is still racy as hcd->state is manipulated outside of
+	 * any locks =P But that will be a different fix.
+	 */
+	spin_lock_irqsave (&ehci->lock, flags);
+	if (hcd->state != HC_STATE_SUSPENDED) {
+		rc = -EINVAL;
+		goto bail;
+	}
+	writel (0, &ehci->regs->intr_enable);
+	(void)readl(&ehci->regs->intr_enable);
+
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ bail:
+	spin_unlock_irqrestore (&ehci->lock, flags);
+
 	// could save FLADJ in case of Vaux power loss
 	// ... we'd only use it to handle clock skew
 
-	return 0;
+	return rc;
 }
 
 static int ehci_pci_resume(struct usb_hcd *hcd)
@@ -251,6 +278,9 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
 	if (time_before(jiffies, ehci->next_statechange))
 		msleep(100);
 
+	/* Mark hardware accessible again as we are out of D3 state by now */
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
 	/* If CF is clear, we lost PCI Vaux power and need to restart.  */
 	if (readl(&ehci->regs->configured_flag) != FLAG_CF)
 		goto restart;
@@ -319,7 +349,7 @@ static const struct hc_driver ehci_pci_hc_driver = {
 	/*
 	 * basic lifecycle operations
 	 */
-	.reset =		ehci_pci_reset,
+	.reset =		ehci_pci_setup,
 	.start =		ehci_run,
 #ifdef	CONFIG_PM
 	.suspend =		ehci_pci_suspend,
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 5bb872c3496..bf03ec0d8ee 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -912,6 +912,7 @@ submit_async (
 	int			epnum;
 	unsigned long		flags;
 	struct ehci_qh		*qh = NULL;
+	int			rc = 0;
 
 	qtd = list_entry (qtd_list->next, struct ehci_qtd, qtd_list);
 	epnum = ep->desc.bEndpointAddress;
@@ -926,21 +927,28 @@ submit_async (
 #endif
 
 	spin_lock_irqsave (&ehci->lock, flags);
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
+			       &ehci_to_hcd(ehci)->flags))) {
+		rc = -ESHUTDOWN;
+		goto done;
+	}
+
 	qh = qh_append_tds (ehci, urb, qtd_list, epnum, &ep->hcpriv);
+	if (unlikely(qh == NULL)) {
+		rc = -ENOMEM;
+		goto done;
+	}
 
 	/* Control/bulk operations through TTs don't need scheduling,
 	 * the HC and TT handle it when the TT has a buffer ready.
 	 */
-	if (likely (qh != NULL)) {
-		if (likely (qh->qh_state == QH_STATE_IDLE))
-			qh_link_async (ehci, qh_get (qh));
-	}
+	if (likely (qh->qh_state == QH_STATE_IDLE))
+		qh_link_async (ehci, qh_get (qh));
+ done:
 	spin_unlock_irqrestore (&ehci->lock, flags);
-	if (unlikely (qh == NULL)) {
+	if (unlikely (qh == NULL))
 		qtd_list_free (ehci, urb, qtd_list);
-		return -ENOMEM;
-	}
-	return 0;
+	return rc;
 }
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index f0c8aa1ccd5..57e77374d22 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -602,6 +602,12 @@ static int intr_submit (
 
 	spin_lock_irqsave (&ehci->lock, flags);
 
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
+			       &ehci_to_hcd(ehci)->flags))) {
+		status = -ESHUTDOWN;
+		goto done;
+	}
+
 	/* get qh and force any scheduling errors */
 	INIT_LIST_HEAD (&empty);
 	qh = qh_append_tds (ehci, urb, &empty, epnum, &ep->hcpriv);
@@ -1456,7 +1462,11 @@ static int itd_submit (struct ehci_hcd *ehci, struct urb *urb,
 
 	/* schedule ... need to lock */
 	spin_lock_irqsave (&ehci->lock, flags);
-	status = iso_stream_schedule (ehci, urb, stream);
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
+			       &ehci_to_hcd(ehci)->flags)))
+		status = -ESHUTDOWN;
+	else
+		status = iso_stream_schedule (ehci, urb, stream);
  	if (likely (status == 0))
 		itd_link_urb (ehci, urb, ehci->periodic_size << 3, stream);
 	spin_unlock_irqrestore (&ehci->lock, flags);
@@ -1815,7 +1825,11 @@ static int sitd_submit (struct ehci_hcd *ehci, struct urb *urb,
 
 	/* schedule ... need to lock */
 	spin_lock_irqsave (&ehci->lock, flags);
-	status = iso_stream_schedule (ehci, urb, stream);
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE,
+			       &ehci_to_hcd(ehci)->flags)))
+		status = -ESHUTDOWN;
+	else
+		status = iso_stream_schedule (ehci, urb, stream);
  	if (status == 0)
 		sitd_link_urb (ehci, urb, ehci->periodic_size << 3, stream);
 	spin_unlock_irqrestore (&ehci->lock, flags);
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 5c0c6c8a7a8..bf1d9abc07a 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -115,7 +115,7 @@
 
 /*-------------------------------------------------------------------------*/
 
-// #define OHCI_VERBOSE_DEBUG	/* not always helpful */
+#undef OHCI_VERBOSE_DEBUG	/* not always helpful */
 
 /* For initializing controller (mask in an HCFS mode too) */
 #define	OHCI_CONTROL_INIT 	OHCI_CTRL_CBSR
@@ -253,6 +253,10 @@ static int ohci_urb_enqueue (
 	spin_lock_irqsave (&ohci->lock, flags);
 
 	/* don't submit to a dead HC */
+	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+		retval = -ENODEV;
+		goto fail;
+	}
 	if (!HC_IS_RUNNING(hcd->state)) {
 		retval = -ENODEV;
 		goto fail;
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index e01e77bc324..72e3b12a192 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -53,6 +53,11 @@ static int ohci_bus_suspend (struct usb_hcd *hcd)
 
 	spin_lock_irqsave (&ohci->lock, flags);
 
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
+		spin_unlock_irqrestore (&ohci->lock, flags);
+		return -ESHUTDOWN;
+	}
+
 	ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 	switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 	case OHCI_USB_RESUME:
@@ -140,11 +145,19 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
 	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
 	u32			temp, enables;
 	int			status = -EINPROGRESS;
+	unsigned long		flags;
 
 	if (time_before (jiffies, ohci->next_statechange))
 		msleep(5);
 
-	spin_lock_irq (&ohci->lock);
+	spin_lock_irqsave (&ohci->lock, flags);
+
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
+		spin_unlock_irqrestore (&ohci->lock, flags);
+		return -ESHUTDOWN;
+	}
+
+
 	ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 
 	if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
@@ -179,7 +192,7 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
 		ohci_dbg (ohci, "lost power\n");
 		status = -EBUSY;
 	}
-	spin_unlock_irq (&ohci->lock);
+	spin_unlock_irqrestore (&ohci->lock, flags);
 	if (status == -EBUSY) {
 		(void) ohci_init (ohci);
 		return ohci_restart (ohci);
@@ -297,8 +310,8 @@ ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
 	/* handle autosuspended root:  finish resuming before
 	 * letting khubd or root hub timer see state changes.
 	 */
-	if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
-			|| !HC_IS_RUNNING(hcd->state)) {
+	if (unlikely((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
+		     || !HC_IS_RUNNING(hcd->state))) {
 		can_suspend = 0;
 		goto done;
 	}
@@ -508,6 +521,9 @@ static int ohci_hub_control (
 	u32		temp;
 	int		retval = 0;
 
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+		return -ESHUTDOWN;
+
 	switch (typeReq) {
 	case ClearHubFeature:
 		switch (wValue) {
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 5f22e6590cd..1b09dde068e 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -105,13 +105,36 @@ ohci_pci_start (struct usb_hcd *hcd)
 
 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 {
-	/* root hub was already suspended */
-	return 0;
+	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
+	unsigned long	flags;
+	int		rc = 0;
+
+	/* Root hub was already suspended. Disable irq emission and
+	 * mark HW unaccessible, bail out if RH has been resumed. Use
+	 * the spinlock to properly synchronize with possible pending
+	 * RH suspend or resume activity.
+	 *
+	 * This is still racy as hcd->state is manipulated outside of
+	 * any locks =P But that will be a different fix.
+	 */
+	spin_lock_irqsave (&ohci->lock, flags);
+	if (hcd->state != HC_STATE_SUSPENDED) {
+		rc = -EINVAL;
+		goto bail;
+	}
+	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ bail:
+	spin_unlock_irqrestore (&ohci->lock, flags);
+
+	return rc;
 }
 
 
 static int ohci_pci_resume (struct usb_hcd *hcd)
 {
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	usb_hcd_resume_root_hub(hcd);
 	return 0;
 }
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index d33ce3982a5..ed550132db0 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -717,6 +717,7 @@ static int uhci_suspend(struct usb_hcd *hcd, pm_message_t message)
 	 * at the source, so we must turn off PIRQ.
 	 */
 	pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	uhci->hc_inaccessible = 1;
 	hcd->poll_rh = 0;
 
@@ -733,6 +734,11 @@ static int uhci_resume(struct usb_hcd *hcd)
 
 	dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
 
+	/* We aren't in D3 state anymore, we do that even if dead as I
+	 * really don't want to keep a stale HCD_FLAG_HW_ACCESSIBLE=0
+	 */
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
 	if (uhci->rh_state == UHCI_RH_RESET)	/* Dead */
 		return 0;
 	spin_lock_irq(&uhci->lock);