[PATCH] USB UHCI: subroutine reordering

This patch moves a few subroutines around in the uhci-hcd source file.
Nothing else is changed.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/uhci-hcd.c

@@ -90,7 +90,6 @@ static char *errbuf;
 static kmem_cache_t *uhci_up_cachep;	/* urb_priv */
 
 static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
-static void hc_state_transitions(struct uhci_hcd *uhci);
 
 /* If a transfer is still active after this much time, turn off FSBR */
 #define IDLE_TIMEOUT	msecs_to_jiffies(50)
@@ -105,96 +104,43 @@ static void hc_state_transitions(struct uhci_hcd *uhci);
 #include "uhci-debug.c"
 #include "uhci-q.c"
 
-static int init_stall_timer(struct usb_hcd *hcd);
-
-static void stall_callback(unsigned long ptr)
-{
-	struct usb_hcd *hcd = (struct usb_hcd *)ptr;
-	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
-	struct urb_priv *up;
-	unsigned long flags;
-
-	spin_lock_irqsave(&uhci->lock, flags);
-	uhci_scan_schedule(uhci, NULL);
-
-	list_for_each_entry(up, &uhci->urb_list, urb_list) {
-		struct urb *u = up->urb;
-
-		spin_lock(&u->lock);
-
-		/* Check if the FSBR timed out */
-		if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
-			uhci_fsbr_timeout(uhci, u);
-
-		spin_unlock(&u->lock);
-	}
-
-	/* Really disable FSBR */
-	if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
-		uhci->fsbrtimeout = 0;
-		uhci->skel_term_qh->link = UHCI_PTR_TERM;
-	}
-
-	/* Poll for and perform state transitions */
-	hc_state_transitions(uhci);
-	if (unlikely(uhci->suspended_ports && uhci->state != UHCI_SUSPENDED))
-		uhci_check_ports(uhci);
-
-	init_stall_timer(hcd);
-	spin_unlock_irqrestore(&uhci->lock, flags);
-}
-
-static int init_stall_timer(struct usb_hcd *hcd)
+static int ports_active(struct uhci_hcd *uhci)
 {
-	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+	unsigned long io_addr = uhci->io_addr;
+	int connection = 0;
+	int i;
 
-	init_timer(&uhci->stall_timer);
-	uhci->stall_timer.function = stall_callback;
-	uhci->stall_timer.data = (unsigned long)hcd;
-	uhci->stall_timer.expires = jiffies + msecs_to_jiffies(100);
-	add_timer(&uhci->stall_timer);
+	for (i = 0; i < uhci->rh_numports; i++)
+		connection |= (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_CCS);
 
-	return 0;
+	return connection;
 }
 
-static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
+static int suspend_allowed(struct uhci_hcd *uhci)
 {
-	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 	unsigned long io_addr = uhci->io_addr;
-	unsigned short status;
+	int i;
 
-	/*
-	 * Read the interrupt status, and write it back to clear the
-	 * interrupt cause.  Contrary to the UHCI specification, the
-	 * "HC Halted" status bit is persistent: it is RO, not R/WC.
+	if (to_pci_dev(uhci_dev(uhci))->vendor != PCI_VENDOR_ID_INTEL)
+		return 1;
+
+	/* Some of Intel's USB controllers have a bug that causes false
+	 * resume indications if any port has an over current condition.
+	 * To prevent problems, we will not allow a global suspend if
+	 * any ports are OC.
+	 *
+	 * Some motherboards using Intel's chipsets (but not using all
+	 * the USB ports) appear to hardwire the over current inputs active
+	 * to disable the USB ports.
 	 */
-	status = inw(io_addr + USBSTS);
-	if (!(status & ~USBSTS_HCH))	/* shared interrupt, not mine */
-		return IRQ_NONE;
-	outw(status, io_addr + USBSTS);		/* Clear it */
 
-	if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
-		if (status & USBSTS_HSE)
-			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");
-		if ((status & USBSTS_HCH) && uhci->state > 0) {
-			dev_err(uhci_dev(uhci), "host controller halted, "
-					"very bad!\n");
-			/* FIXME: Reset the controller, fix the offending TD */
-		}
+	/* check for over current condition on any port */
+	for (i = 0; i < uhci->rh_numports; i++) {
+		if (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_OC)
+			return 0;
 	}
 
-	if (status & USBSTS_RD)
-		uhci->resume_detect = 1;
-
-	spin_lock(&uhci->lock);
-	uhci_scan_schedule(uhci, regs);
-	spin_unlock(&uhci->lock);
-
-	return IRQ_HANDLED;
+	return 1;
 }
 
 static void reset_hc(struct uhci_hcd *uhci)
@@ -276,43 +222,46 @@ static void wakeup_hc(struct uhci_hcd *uhci)
 	}
 }
 
-static int ports_active(struct uhci_hcd *uhci)
+static int start_hc(struct uhci_hcd *uhci)
 {
 	unsigned long io_addr = uhci->io_addr;
-	int connection = 0;
-	int i;
-
-	for (i = 0; i < uhci->rh_numports; i++)
-		connection |= (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_CCS);
+	int timeout = 10;
 
-	return connection;
-}
+	/*
+	 * Reset the HC - this will force us to get a
+	 * new notification of any already connected
+	 * ports due to the virtual disconnect that it
+	 * implies.
+	 */
+	outw(USBCMD_HCRESET, io_addr + USBCMD);
+	while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
+		if (--timeout < 0) {
+			dev_err(uhci_dev(uhci), "USBCMD_HCRESET timed out!\n");
+			return -ETIMEDOUT;
+		}
+		msleep(1);
+	}
 
-static int suspend_allowed(struct uhci_hcd *uhci)
-{
-	unsigned long io_addr = uhci->io_addr;
-	int i;
+	/* Mark controller as running before we enable interrupts */
+	uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
 
-	if (to_pci_dev(uhci_dev(uhci))->vendor != PCI_VENDOR_ID_INTEL)
-		return 1;
+	/* Turn on PIRQ and all interrupts */
+	pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
+			USBLEGSUP_DEFAULT);
+	outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
+		io_addr + USBINTR);
 
-	/* Some of Intel's USB controllers have a bug that causes false
-	 * resume indications if any port has an over current condition.
-	 * To prevent problems, we will not allow a global suspend if
-	 * any ports are OC.
-	 *
-	 * Some motherboards using Intel's chipsets (but not using all
-	 * the USB ports) appear to hardwire the over current inputs active
-	 * to disable the USB ports.
-	 */
+	/* Start at frame 0 */
+	outw(0, io_addr + USBFRNUM);
+	outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
 
-	/* check for over current condition on any port */
-	for (i = 0; i < uhci->rh_numports; i++) {
-		if (inw(io_addr + USBPORTSC1 + i * 2) & USBPORTSC_OC)
-			return 0;
-	}
+	/* Run and mark it configured with a 64-byte max packet */
+	uhci->state = UHCI_RUNNING_GRACE;
+	uhci->state_end = jiffies + HZ;
+	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
+	uhci->is_stopped = 0;
 
-	return 1;
+	return 0;
 }
 
 static void hc_state_transitions(struct uhci_hcd *uhci)
@@ -353,56 +302,106 @@ static void hc_state_transitions(struct uhci_hcd *uhci)
 	}
 }
 
-/*
- * Store the current frame number in uhci->frame_number if the controller
- * is runnning
- */
-static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
+static int init_stall_timer(struct usb_hcd *hcd);
+
+static void stall_callback(unsigned long ptr)
 {
-	if (!uhci->is_stopped)
-		uhci->frame_number = inw(uhci->io_addr + USBFRNUM);
+	struct usb_hcd *hcd = (struct usb_hcd *)ptr;
+	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+	struct urb_priv *up;
+	unsigned long flags;
+
+	spin_lock_irqsave(&uhci->lock, flags);
+	uhci_scan_schedule(uhci, NULL);
+
+	list_for_each_entry(up, &uhci->urb_list, urb_list) {
+		struct urb *u = up->urb;
+
+		spin_lock(&u->lock);
+
+		/* Check if the FSBR timed out */
+		if (up->fsbr && !up->fsbr_timeout && time_after_eq(jiffies, up->fsbrtime + IDLE_TIMEOUT))
+			uhci_fsbr_timeout(uhci, u);
+
+		spin_unlock(&u->lock);
+	}
+
+	/* Really disable FSBR */
+	if (!uhci->fsbr && uhci->fsbrtimeout && time_after_eq(jiffies, uhci->fsbrtimeout)) {
+		uhci->fsbrtimeout = 0;
+		uhci->skel_term_qh->link = UHCI_PTR_TERM;
+	}
+
+	/* Poll for and perform state transitions */
+	hc_state_transitions(uhci);
+	if (unlikely(uhci->suspended_ports && uhci->state != UHCI_SUSPENDED))
+		uhci_check_ports(uhci);
+
+	init_stall_timer(hcd);
+	spin_unlock_irqrestore(&uhci->lock, flags);
 }
 
-static int start_hc(struct uhci_hcd *uhci)
+static int init_stall_timer(struct usb_hcd *hcd)
 {
+	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+
+	init_timer(&uhci->stall_timer);
+	uhci->stall_timer.function = stall_callback;
+	uhci->stall_timer.data = (unsigned long)hcd;
+	uhci->stall_timer.expires = jiffies + msecs_to_jiffies(100);
+	add_timer(&uhci->stall_timer);
+
+	return 0;
+}
+
+static irqreturn_t uhci_irq(struct usb_hcd *hcd, struct pt_regs *regs)
+{
+	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 	unsigned long io_addr = uhci->io_addr;
-	int timeout = 10;
+	unsigned short status;
 
 	/*
-	 * Reset the HC - this will force us to get a
-	 * new notification of any already connected
-	 * ports due to the virtual disconnect that it
-	 * implies.
+	 * Read the interrupt status, and write it back to clear the
+	 * interrupt cause.  Contrary to the UHCI specification, the
+	 * "HC Halted" status bit is persistent: it is RO, not R/WC.
 	 */
-	outw(USBCMD_HCRESET, io_addr + USBCMD);
-	while (inw(io_addr + USBCMD) & USBCMD_HCRESET) {
-		if (--timeout < 0) {
-			dev_err(uhci_dev(uhci), "USBCMD_HCRESET timed out!\n");
-			return -ETIMEDOUT;
+	status = inw(io_addr + USBSTS);
+	if (!(status & ~USBSTS_HCH))	/* shared interrupt, not mine */
+		return IRQ_NONE;
+	outw(status, io_addr + USBSTS);		/* Clear it */
+
+	if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
+		if (status & USBSTS_HSE)
+			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");
+		if ((status & USBSTS_HCH) && uhci->state > 0) {
+			dev_err(uhci_dev(uhci), "host controller halted, "
+					"very bad!\n");
+			/* FIXME: Reset the controller, fix the offending TD */
 		}
-		msleep(1);
 	}
 
-	/* Mark controller as running before we enable interrupts */
-	uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
-
-	/* Turn on PIRQ and all interrupts */
-	pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
-			USBLEGSUP_DEFAULT);
-	outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
-		io_addr + USBINTR);
+	if (status & USBSTS_RD)
+		uhci->resume_detect = 1;
 
-	/* Start at frame 0 */
-	outw(0, io_addr + USBFRNUM);
-	outl(uhci->fl->dma_handle, io_addr + USBFLBASEADD);
+	spin_lock(&uhci->lock);
+	uhci_scan_schedule(uhci, regs);
+	spin_unlock(&uhci->lock);
 
-	/* Run and mark it configured with a 64-byte max packet */
-	uhci->state = UHCI_RUNNING_GRACE;
-	uhci->state_end = jiffies + HZ;
-	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
-	uhci->is_stopped = 0;
+	return IRQ_HANDLED;
+}
 
-	return 0;
+/*
+ * Store the current frame number in uhci->frame_number if the controller
+ * is runnning
+ */
+static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
+{
+	if (!uhci->is_stopped)
+		uhci->frame_number = inw(uhci->io_addr + USBFRNUM);
 }
 
 /*