Merge branch 'usb-callbacks'

Sebastian Andrzej Siewior says:

====================
net/usb: Use irqsave in USB's complete callback

This is about using _irqsave() primitives in the completion callback in
order to get rid of local_irq_save() in __usb_hcd_giveback_urb().
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/cdc-phonet.c

@@ -99,6 +99,7 @@ static void tx_complete(struct urb *req)
 	struct net_device *dev = skb->dev;
 	struct usbpn_dev *pnd = netdev_priv(dev);
 	int status = req->status;
+	unsigned long flags;
 
 	switch (status) {
 	case 0:
@@ -115,10 +116,10 @@ static void tx_complete(struct urb *req)
 	}
 	dev->stats.tx_packets++;
 
-	spin_lock(&pnd->tx_lock);
+	spin_lock_irqsave(&pnd->tx_lock, flags);
 	pnd->tx_queue--;
 	netif_wake_queue(dev);
-	spin_unlock(&pnd->tx_lock);
+	spin_unlock_irqrestore(&pnd->tx_lock, flags);
 
 	dev_kfree_skb_any(skb);
 	usb_free_urb(req);

drivers/net/usb/hso.c

@@ -999,6 +999,7 @@ static void read_bulk_callback(struct urb *urb)
 	struct hso_net *odev = urb->context;
 	struct net_device *net;
 	int result;
+	unsigned long flags;
 	int status = urb->status;
 
 	/* is al ok?  (Filip: Who's Al ?) */
@@ -1028,11 +1029,11 @@ static void read_bulk_callback(struct urb *urb)
 	if (urb->actual_length) {
 		/* Handle the IP stream, add header and push it onto network
 		 * stack if the packet is complete. */
-		spin_lock(&odev->net_lock);
+		spin_lock_irqsave(&odev->net_lock, flags);
 		packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
 			    (urb->transfer_buffer_length >
 			     urb->actual_length) ? 1 : 0);
-		spin_unlock(&odev->net_lock);
+		spin_unlock_irqrestore(&odev->net_lock, flags);
 	}
 
 	/* We are done with this URB, resubmit it. Prep the USB to wait for
@@ -1193,6 +1194,7 @@ static void hso_std_serial_read_bulk_callback(struct urb *urb)
 {
 	struct hso_serial *serial = urb->context;
 	int status = urb->status;
+	unsigned long flags;
 
 	hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status);
 
@@ -1216,10 +1218,10 @@ static void hso_std_serial_read_bulk_callback(struct urb *urb)
 	if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
 		fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
 	/* Valid data, handle RX data */
-	spin_lock(&serial->serial_lock);
+	spin_lock_irqsave(&serial->serial_lock, flags);
 	serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
 	put_rxbuf_data_and_resubmit_bulk_urb(serial);
-	spin_unlock(&serial->serial_lock);
+	spin_unlock_irqrestore(&serial->serial_lock, flags);
 }
 
 /*
@@ -1502,12 +1504,13 @@ static void tiocmget_intr_callback(struct urb *urb)
 		DUMP(serial_state_notification,
 		     sizeof(struct hso_serial_state_notification));
 	} else {
+		unsigned long flags;
 
 		UART_state_bitmap = le16_to_cpu(serial_state_notification->
 						UART_state_bitmap);
 		prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
 		icount = &tiocmget->icount;
-		spin_lock(&serial->serial_lock);
+		spin_lock_irqsave(&serial->serial_lock, flags);
 		if ((UART_state_bitmap & B_OVERRUN) !=
 		   (prev_UART_state_bitmap & B_OVERRUN))
 			icount->parity++;
@@ -1530,7 +1533,7 @@ static void tiocmget_intr_callback(struct urb *urb)
 		   (prev_UART_state_bitmap & B_RX_CARRIER))
 			icount->dcd++;
 		tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
-		spin_unlock(&serial->serial_lock);
+		spin_unlock_irqrestore(&serial->serial_lock, flags);
 		tiocmget->intr_completed = 1;
 		wake_up_interruptible(&tiocmget->waitq);
 	}
@@ -1852,6 +1855,7 @@ static void intr_callback(struct urb *urb)
 	struct hso_serial *serial;
 	unsigned char *port_req;
 	int status = urb->status;
+	unsigned long flags;
 	int i;
 
 	usb_mark_last_busy(urb->dev);
@@ -1879,7 +1883,7 @@ static void intr_callback(struct urb *urb)
 			if (serial != NULL) {
 				hso_dbg(0x1, "Pending read interrupt on port %d\n",
 					i);
-				spin_lock(&serial->serial_lock);
+				spin_lock_irqsave(&serial->serial_lock, flags);
 				if (serial->rx_state == RX_IDLE &&
 					serial->port.count > 0) {
 					/* Setup and send a ctrl req read on
@@ -1893,7 +1897,8 @@ static void intr_callback(struct urb *urb)
 					hso_dbg(0x1, "Already a read pending on port %d or port not open\n",
 						i);
 				}
-				spin_unlock(&serial->serial_lock);
+				spin_unlock_irqrestore(&serial->serial_lock,
+						       flags);
 			}
 		}
 	}
@@ -1920,6 +1925,7 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
 {
 	struct hso_serial *serial = urb->context;
 	int status = urb->status;
+	unsigned long flags;
 
 	/* sanity check */
 	if (!serial) {
@@ -1927,9 +1933,9 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
 		return;
 	}
 
-	spin_lock(&serial->serial_lock);
+	spin_lock_irqsave(&serial->serial_lock, flags);
 	serial->tx_urb_used = 0;
-	spin_unlock(&serial->serial_lock);
+	spin_unlock_irqrestore(&serial->serial_lock, flags);
 	if (status) {
 		handle_usb_error(status, __func__, serial->parent);
 		return;
@@ -1971,14 +1977,15 @@ static void ctrl_callback(struct urb *urb)
 	struct hso_serial *serial = urb->context;
 	struct usb_ctrlrequest *req;
 	int status = urb->status;
+	unsigned long flags;
 
 	/* sanity check */
 	if (!serial)
 		return;
 
-	spin_lock(&serial->serial_lock);
+	spin_lock_irqsave(&serial->serial_lock, flags);
 	serial->tx_urb_used = 0;
-	spin_unlock(&serial->serial_lock);
+	spin_unlock_irqrestore(&serial->serial_lock, flags);
 	if (status) {
 		handle_usb_error(status, __func__, serial->parent);
 		return;
@@ -1994,9 +2001,9 @@ static void ctrl_callback(struct urb *urb)
 	    (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
 		/* response to a read command */
 		serial->rx_urb_filled[0] = 1;
-		spin_lock(&serial->serial_lock);
+		spin_lock_irqsave(&serial->serial_lock, flags);
 		put_rxbuf_data_and_resubmit_ctrl_urb(serial);
-		spin_unlock(&serial->serial_lock);
+		spin_unlock_irqrestore(&serial->serial_lock, flags);
 	} else {
 		hso_put_activity(serial->parent);
 		tty_port_tty_wakeup(&serial->port);

drivers/net/usb/kaweth.c

@@ -587,7 +587,7 @@ static void kaweth_usb_receive(struct urb *urb)
 	struct kaweth_device *kaweth = urb->context;
 	struct net_device *net = kaweth->net;
 	int status = urb->status;
-
+	unsigned long flags;
 	int count = urb->actual_length;
 	int count2 = urb->transfer_buffer_length;
 
@@ -619,12 +619,12 @@ static void kaweth_usb_receive(struct urb *urb)
 		net->stats.rx_errors++;
 		dev_dbg(dev, "Status was -EOVERFLOW.\n");
 	}
-	spin_lock(&kaweth->device_lock);
+	spin_lock_irqsave(&kaweth->device_lock, flags);
 	if (IS_BLOCKED(kaweth->status)) {
-		spin_unlock(&kaweth->device_lock);
+		spin_unlock_irqrestore(&kaweth->device_lock, flags);
 		return;
 	}
-	spin_unlock(&kaweth->device_lock);
+	spin_unlock_irqrestore(&kaweth->device_lock, flags);
 
 	if(status && status != -EREMOTEIO && count != 1) {
 		dev_err(&kaweth->intf->dev,

drivers/net/usb/r8152.c

@@ -1252,6 +1252,7 @@ static void read_bulk_callback(struct urb *urb)
 	int status = urb->status;
 	struct rx_agg *agg;
 	struct r8152 *tp;
+	unsigned long flags;
 
 	agg = urb->context;
 	if (!agg)
@@ -1281,9 +1282,9 @@ static void read_bulk_callback(struct urb *urb)
 		if (urb->actual_length < ETH_ZLEN)
 			break;
 
-		spin_lock(&tp->rx_lock);
+		spin_lock_irqsave(&tp->rx_lock, flags);
 		list_add_tail(&agg->list, &tp->rx_done);
-		spin_unlock(&tp->rx_lock);
+		spin_unlock_irqrestore(&tp->rx_lock, flags);
 		napi_schedule(&tp->napi);
 		return;
 	case -ESHUTDOWN:
@@ -1311,6 +1312,7 @@ static void write_bulk_callback(struct urb *urb)
 	struct net_device *netdev;
 	struct tx_agg *agg;
 	struct r8152 *tp;
+	unsigned long flags;
 	int status = urb->status;
 
 	agg = urb->context;
@@ -1332,9 +1334,9 @@ static void write_bulk_callback(struct urb *urb)
 		stats->tx_bytes += agg->skb_len;
 	}
 
-	spin_lock(&tp->tx_lock);
+	spin_lock_irqsave(&tp->tx_lock, flags);
 	list_add_tail(&agg->list, &tp->tx_free);
-	spin_unlock(&tp->tx_lock);
+	spin_unlock_irqrestore(&tp->tx_lock, flags);
 
 	usb_autopm_put_interface_async(tp->intf);
 

drivers/net/usb/rtl8150.c

@@ -391,6 +391,7 @@ static void read_bulk_callback(struct urb *urb)
 	u16 rx_stat;
 	int status = urb->status;
 	int result;
+	unsigned long flags;
 
 	dev = urb->context;
 	if (!dev)
@@ -432,9 +433,9 @@ static void read_bulk_callback(struct urb *urb)
 	netdev->stats.rx_packets++;
 	netdev->stats.rx_bytes += pkt_len;
 
-	spin_lock(&dev->rx_pool_lock);
+	spin_lock_irqsave(&dev->rx_pool_lock, flags);
 	skb = pull_skb(dev);
-	spin_unlock(&dev->rx_pool_lock);
+	spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 	if (!skb)
 		goto resched;