netdev - [PATCH 07/50] USB: ldusb: spin_lock in complete() cleanup

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Date:	Thu, 11 Jul 2013 17:05:30 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-input@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	linux-media@...r.kernel.org, alsa-devel@...a-project.org,
	Ming Lei <ming.lei@...onical.com>
Subject: [PATCH 07/50] USB: ldusb: spin_lock in complete() cleanup

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

Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 drivers/usb/misc/ldusb.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c
index ac76229..8bae18e 100644
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -249,6 +249,7 @@ static void ld_usb_interrupt_in_callback(struct urb *urb)
 	unsigned int next_ring_head;
 	int status = urb->status;
 	int retval;
+	unsigned long flags;
 
 	if (status) {
 		if (status == -ENOENT ||
@@ -258,12 +259,12 @@ static void ld_usb_interrupt_in_callback(struct urb *urb)
 		} else {
 			dbg_info(&dev->intf->dev, "%s: nonzero status received: %d\n",
 				 __func__, status);
-			spin_lock(&dev->rbsl);
+			spin_lock_irqsave(&dev->rbsl, flags);
 			goto resubmit; /* maybe we can recover */
 		}
 	}
 
-	spin_lock(&dev->rbsl);
+	spin_lock_irqsave(&dev->rbsl, flags);
 	if (urb->actual_length > 0) {
 		next_ring_head = (dev->ring_head+1) % ring_buffer_size;
 		if (next_ring_head != dev->ring_tail) {
@@ -292,7 +293,7 @@ resubmit:
 			dev->buffer_overflow = 1;
 		}
 	}
-	spin_unlock(&dev->rbsl);
+	spin_unlock_irqrestore(&dev->rbsl, flags);
 exit:
 	dev->interrupt_in_done = 1;
 	wake_up_interruptible(&dev->read_wait);
-- 
1.7.9.5

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