[02/50] USB: cdc-wdm: spin_lock in complete() cleanup

Commit Message

Ming Lei July 11, 2013, 9:05 a.m. UTC

Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().

Cc: Oliver Neukum <[e-mail]>
Signed-off-by: Ming Lei <[e-mail]>
---
 drivers/usb/class/cdc-wdm.c |   16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

Patch

diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 8a230f0..5f78d18 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -143,10 +143,12 @@  found:
 static void wdm_out_callback(struct urb *urb)
 {
 	struct wdm_device *desc;
+	unsigned long flags;
+
 	desc = urb->context;
-	spin_lock(&desc->iuspin);
+	spin_lock_irqsave(&desc->iuspin, flags);
 	desc->werr = urb->status;
-	spin_unlock(&desc->iuspin);
+	spin_unlock_irqrestore(&desc->iuspin, flags);
 	kfree(desc->outbuf);
 	desc->outbuf = NULL;
 	clear_bit(WDM_IN_USE, &desc->flags);
@@ -158,8 +160,9 @@  static void wdm_in_callback(struct urb *urb)
 	struct wdm_device *desc = urb->context;
 	int status = urb->status;
 	int length = urb->actual_length;
+	unsigned long flags;
 
-	spin_lock(&desc->iuspin);
+	spin_lock_irqsave(&desc->iuspin, flags);
 	clear_bit(WDM_RESPONDING, &desc->flags);
 
 	if (status) {
@@ -203,7 +206,7 @@  skip_error:
 	wake_up(&desc->wait);
 
 	set_bit(WDM_READ, &desc->flags);
-	spin_unlock(&desc->iuspin);
+	spin_unlock_irqrestore(&desc->iuspin, flags);
 }
 
 static void wdm_int_callback(struct urb *urb)
@@ -212,6 +215,7 @@  static void wdm_int_callback(struct urb *urb)
 	int status = urb->status;
 	struct wdm_device *desc;
 	struct usb_cdc_notification *dr;
+	unsigned long flags;
 
 	desc = urb->context;
 	dr = (struct usb_cdc_notification *)desc->sbuf;
@@ -260,7 +264,7 @@  static void wdm_int_callback(struct urb *urb)
 		goto exit;
 	}
 
-	spin_lock(&desc->iuspin);
+	spin_lock_irqsave(&desc->iuspin, flags);
 	clear_bit(WDM_READ, &desc->flags);
 	set_bit(WDM_RESPONDING, &desc->flags);
 	if (!test_bit(WDM_DISCONNECTING, &desc->flags)
@@ -269,7 +273,7 @@  static void wdm_int_callback(struct urb *urb)
 		dev_dbg(&desc->intf->dev, "%s: usb_submit_urb %d",
 			__func__, rv);
 	}
-	spin_unlock(&desc->iuspin);
+	spin_unlock_irqrestore(&desc->iuspin, flags);
 	if (rv < 0) {
 		clear_bit(WDM_RESPONDING, &desc->flags);
 		if (rv == -EPERM)