USB: straighten out port feature vs. port status usage

This patch (as1349b) clears up the confusion in many USB host
controller drivers between port features and port statuses.  In mosty
cases it's true that the status bit is in the position given by the
corresponding feature value, but that's not always true and it's not
guaranteed in the USB spec.

There's no functional change, just replacing expressions of the form
(1 << USB_PORT_FEAT_x) with USB_PORT_STAT_x, which has the same value.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 15 deletions

diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index a004a1220848..6db57ab6079d 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -1018,10 +1018,10 @@ static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port,
 	rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
 	rh->scount = R8A66597_MAX_SAMPLING;
 	if (connect)
-		rh->port |= 1 << USB_PORT_FEAT_CONNECTION;
+		rh->port |= USB_PORT_STAT_CONNECTION;
 	else
-		rh->port &= ~(1 << USB_PORT_FEAT_CONNECTION);
-	rh->port |= 1 << USB_PORT_FEAT_C_CONNECTION;
+		rh->port &= ~USB_PORT_STAT_CONNECTION;
+	rh->port |= USB_PORT_STAT_C_CONNECTION << 16;
 
 	r8a66597_root_hub_start_polling(r8a66597);
 }
@@ -1065,8 +1065,8 @@ static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
 	else if (speed == LSMODE)
 		rh->port |= USB_PORT_STAT_LOW_SPEED;
 
-	rh->port &= ~(1 << USB_PORT_FEAT_RESET);
-	rh->port |= 1 << USB_PORT_FEAT_ENABLE;
+	rh->port &= USB_PORT_STAT_RESET;
+	rh->port |= USB_PORT_STAT_ENABLE;
 }
 
 /* this function must be called with interrupt disabled */
@@ -1705,7 +1705,7 @@ static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
 	u16 tmp;
 	struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
 
-	if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
+	if (rh->port & USB_PORT_STAT_RESET) {
 		unsigned long dvstctr_reg = get_dvstctr_reg(port);
 
 		tmp = r8a66597_read(r8a66597, dvstctr_reg);
@@ -1717,7 +1717,7 @@ static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
 			r8a66597_usb_connect(r8a66597, port);
 	}
 
-	if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) {
+	if (!(rh->port & USB_PORT_STAT_CONNECTION)) {
 		r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
 		r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
 	}
@@ -2185,7 +2185,7 @@ static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 
 		switch (wValue) {
 		case USB_PORT_FEAT_ENABLE:
-			rh->port &= ~(1 << USB_PORT_FEAT_POWER);
+			rh->port &= ~USB_PORT_STAT_POWER;
 			break;
 		case USB_PORT_FEAT_SUSPEND:
 			break;
@@ -2226,12 +2226,12 @@ static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			break;
 		case USB_PORT_FEAT_POWER:
 			r8a66597_port_power(r8a66597, port, 1);
-			rh->port |= (1 << USB_PORT_FEAT_POWER);
+			rh->port |= USB_PORT_STAT_POWER;
 			break;
 		case USB_PORT_FEAT_RESET: {
 			struct r8a66597_device *dev = rh->dev;
 
-			rh->port |= (1 << USB_PORT_FEAT_RESET);
+			rh->port |= USB_PORT_STAT_RESET;
 
 			disable_r8a66597_pipe_all(r8a66597, dev);
 			free_usb_address(r8a66597, dev, 1);
@@ -2269,12 +2269,12 @@ static int r8a66597_bus_suspend(struct usb_hcd *hcd)
 		struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
 		unsigned long dvstctr_reg = get_dvstctr_reg(port);
 
-		if (!(rh->port & (1 << USB_PORT_FEAT_ENABLE)))
+		if (!(rh->port & USB_PORT_STAT_ENABLE))
 			continue;
 
 		dbg("suspend port = %d", port);
 		r8a66597_bclr(r8a66597, UACT, dvstctr_reg);	/* suspend */
-		rh->port |= 1 << USB_PORT_FEAT_SUSPEND;
+		rh->port |= USB_PORT_STAT_SUSPEND;
 
 		if (rh->dev->udev->do_remote_wakeup) {
 			msleep(3);	/* waiting last SOF */
@@ -2300,12 +2300,12 @@ static int r8a66597_bus_resume(struct usb_hcd *hcd)
 		struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
 		unsigned long dvstctr_reg = get_dvstctr_reg(port);
 
-		if (!(rh->port & (1 << USB_PORT_FEAT_SUSPEND)))
+		if (!(rh->port & USB_PORT_STAT_SUSPEND))
 			continue;
 
 		dbg("resume port = %d", port);
-		rh->port &= ~(1 << USB_PORT_FEAT_SUSPEND);
-		rh->port |= 1 << USB_PORT_FEAT_C_SUSPEND;
+		rh->port &= ~USB_PORT_STAT_SUSPEND;
+		rh->port |= USB_PORT_STAT_C_SUSPEND < 16;
 		r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg);
 		msleep(50);
 		r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg);