[PATCH 1/3] stkwebcam: fix crash on close after disconnect

["David Ellingsworth" <david@xxxxxxxxxxxxxxxxx>]

>From 8d65eca383fffb30259be3a33539ec36b5196c4e Mon Sep 17 00:00:00 2001
From: David Ellingsworth <david@xxxxxxxxxxxxxxxxx>
Date: Mon, 29 Sep 2008 19:59:11 -0400
Subject: [PATCH] stkwebcam: fix crash on close after disconnect


Signed-off-by: David Ellingsworth <david@xxxxxxxxxxxxxxxxx>
---
 drivers/media/video/stk-webcam.c |   18 +++++++-----------
 1 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
index 8dda568..3198549 100644
--- a/drivers/media/video/stk-webcam.c
+++ b/drivers/media/video/stk-webcam.c
@@ -576,7 +576,7 @@ static void stk_clean_iso(struct stk_camera *dev)

 		urb = dev->isobufs[i].urb;
 		if (urb) {
-			if (atomic_read(&dev->urbs_used))
+			if (atomic_read(&dev->urbs_used) && is_present(dev))
 				usb_kill_urb(urb);
 			usb_free_urb(urb);
 		}
@@ -718,19 +718,15 @@ static int v4l_stk_release(struct inode *inode,
struct file *fp)
 		return -ENODEV;
 	}

-	if (dev->owner != fp) {
-		usb_autopm_put_interface(dev->interface);
-		kref_put(&dev->kref, stk_camera_cleanup);
-		return 0;
+	if (dev->owner == fp) {
+		stk_stop_stream(dev);
+		stk_free_buffers(dev);
+		dev->owner = NULL;
 	}

-	stk_stop_stream(dev);
-
-	stk_free_buffers(dev);
-
-	dev->owner = NULL;
+	if(is_present(dev))
+		usb_autopm_put_interface(dev->interface);

-	usb_autopm_put_interface(dev->interface);
 	kref_put(&dev->kref, stk_camera_cleanup);

 	return 0;
-- 
1.5.6

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