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linux-stable/drivers/media/dvb/dvb-core
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Jiri Slaby 1c488ea9d5 V4L/DVB: DVB: fix dvr node refcounting 
In dvb_dvr_release, there is a test dvbdev->users==-1, but users are
never negative. This error results in hung tasks:
  task                        PC stack   pid father
bash          D ffffffffa000c948     0  3264   3170 0x00000000
 ffff88003aec5ce8 0000000000000086 0000000000011f80 0000000000011f80
 ffff88003aec5fd8 ffff88003aec5fd8 ffff88003b848670 0000000000011f80
 ffff88003aec5fd8 0000000000011f80 ffff88003e02a030 ffff88003b848670
Call Trace:
 [<ffffffff813dd4a5>] dvb_dmxdev_release+0xc5/0x130
 [<ffffffff8107b750>] ? autoremove_wake_function+0x0/0x40
 [<ffffffffa00013a2>] dvb_usb_adapter_dvb_exit+0x42/0x70 [dvb_usb]
 [<ffffffffa0000525>] dvb_usb_exit+0x55/0xd0 [dvb_usb]
 [<ffffffffa00005ee>] dvb_usb_device_exit+0x4e/0x70 [dvb_usb]
 [<ffffffffa000a065>] af9015_usb_device_exit+0x55/0x60 [dvb_usb_af9015]
 [<ffffffff813a3f05>] usb_unbind_interface+0x55/0x1a0
 [<ffffffff81316000>] __device_release_driver+0x70/0xe0
...

So check against 1 there instead.

BTW why's the TODO there? Adding TODOs to the code without
descriptions is like adding nothing.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-02 16:43:16 -03:00
..
demux.h V4L/DVB (8131): dmx_write: memcpy from user-supplied pointer 2008-07-20 07:13:27 -03:00
dmxdev.c V4L/DVB: DVB: fix dvr node refcounting 2010-08-02 16:43:16 -03:00
dmxdev.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dvb_ca_en50221.c V4L/DVB: dvb_ca_en50221: return -EFAULT on copy_to_user errors 2010-08-02 15:28:59 -03:00
dvb_ca_en50221.h V4L/DVB (9054): implement proper locking in the dvb ca en50221 driver 2009-01-29 08:35:37 -02:00
dvb_demux.c V4L/DVB: drivers/media: Use memdup_user 2010-08-02 15:20:28 -03:00
dvb_demux.h V4L/DVB (13271): TS speed check. Logging transport stream speed in Kbits per second 2009-12-05 18:41:11 -02:00
dvb_filter.c
dvb_filter.h
dvb_frontend.c V4L/DVB: dvb_frontend: fix typos in comments and one function 2010-08-02 15:35:51 -03:00
dvb_frontend.h include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
dvb_math.c
dvb_math.h
dvb_net.c V4L/DVB: dvb-core: Fix ULE decapsulation bug 2010-06-01 01:24:21 -03:00
dvb_net.h
dvb_ringbuffer.c V4L/DVB: DVB: Export dvb_ringbuffer_flush() again 2010-02-26 15:10:54 -03:00
dvb_ringbuffer.h V4L/DVB (8130): split dvb_ringbuffer dual-use functions 2008-07-20 07:13:23 -03:00
dvbdev.c dvb: Push down BKL into ioctl functions 2010-05-17 05:27:04 +02:00
dvbdev.h dvb: Push down BKL into ioctl functions 2010-05-17 05:27:04 +02:00
Makefile