V4L/DVB (6548): pvrusb2: Fix oops on module removal

The pvrusb2 driver is tearing down its sysfs related pieces in the
incorrect order.  This leaves dangling pointers which causes the
kernel device core to oops.  The problem has been present virtually
forever but became malignant with the changeover to the way of
handling /sys/class.  Fix is just to make sure we don't tear down the
class structure until AFTER the driver instances are deregistered.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/pvrusb2/pvrusb2-main.c b/drivers/media/video/pvrusb2/pvrusb2-main.c
index ca9e2789c8ca58d5c00988cb56158a4cbffb519b..11b3b2e84b9092da3983fab9ab130a8f485a85d8 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-main.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-main.c
@@ -136,14 +136,13 @@ static int __init pvr_init(void)
 
 static void __exit pvr_exit(void)
 {
-
        pvr2_trace(PVR2_TRACE_INIT,"pvr_exit");
 
+       usb_deregister(&pvr_driver);
+
 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
        pvr2_sysfs_class_destroy(class_ptr);
 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
-
-       usb_deregister(&pvr_driver);
 }
 
 module_init(pvr_init);