V4L/DVB: budget: Oops: "BUG: unable to handle kernel NULL pointer dereference"
authorBjørn Mork <bjorn@mork.no>
Wed, 24 Mar 2010 13:30:15 +0000 (10:30 -0300)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Wed, 19 May 2010 15:57:17 +0000 (12:57 -0300)
commitdd0bbcc626d8baa6821c6cb9c45ecf3759ef8088
tree8cb1abe3267e5d150adcb657baaf4272439551f2
parent784a493168f71ce02b5f9eab0ec19df29b999631
V4L/DVB: budget: Oops: "BUG: unable to handle kernel NULL pointer dereference"

Never call dvb_frontend_detach if we failed to attach a frontend. This fixes
the following oops:

[    8.172997] DVB: registering new adapter (TT-Budget S2-1600 PCI)
[    8.209018] adapter has MAC addr = 00:d0:5c:cc:a7:29
[    8.328665] Intel ICH 0000:00:1f.5: PCI INT B -> GSI 17 (level, low) -> IRQ 17
[    8.328753] Intel ICH 0000:00:1f.5: setting latency timer to 64
[    8.562047] DVB: Unable to find symbol stv090x_attach()
[    8.562117] BUG: unable to handle kernel NULL pointer dereference at 000000ac
[    8.562239] IP: [<e08b04a3>] dvb_frontend_detach+0x4/0x67 [dvb_core]

Ref http://bugs.debian.org/575207

Also clean up if we are unable to register the tuner and LNB drivers

[mchehab@redhat.com: add printk log level, to calm down chechpatch.pl]
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Reported-by: Fladischer Michael <FladischerMichael@fladi.at>
Acked-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
drivers/media/dvb/ttpci/budget.c