From e3a5ee73e7223cda78f2770572c5ad01928496d6 Mon Sep 17 00:00:00 2001 From: Mike Isely Date: Sat, 15 May 2010 00:30:29 -0300 Subject: [PATCH] V4L/DVB: pvrusb2: Fix kernel oops on device tear-down pvrusb2: Delete sysfs class device as the _very_ last step, after we're sure that all driver contexts have gone away first. This is important because it appears that there isn't any protection from a struct device instance reference a deleted struct class instance. The assumption in the kernel code appears to be that the class instance is assumed to be around for the life of the device. So we can't let the class instance go away until all referencing device instances are gone; this is ensured by delaying removal of the class instance until after the driver contexts have all gone away. This bug has been present for a very long time but it didn't apparently become malignant until recently (probably because of other changes in the kernel). Signed-off-by: Mike Isely Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/pvrusb2/pvrusb2-main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/video/pvrusb2/pvrusb2-main.c b/drivers/media/video/pvrusb2/pvrusb2-main.c index eeacd0f..2254194 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-main.c +++ b/drivers/media/video/pvrusb2/pvrusb2-main.c @@ -153,12 +153,12 @@ static void __exit pvr_exit(void) usb_deregister(&pvr_driver); + pvr2_context_global_done(); + #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS pvr2_sysfs_class_destroy(class_ptr); #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */ - pvr2_context_global_done(); - pvr2_trace(PVR2_TRACE_INIT,"pvr_exit complete"); } -- 2.7.4