diff options
| author | David Fries <david@fries.net> | 2011-12-15 01:59:20 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-12-30 17:38:15 -0200 |
| commit | 7b0962d32362a0d56627a1dfdb4e8229c5f51f94 (patch) | |
| tree | 9cf041ff5778e3479808f50487a730ca60ea518d /drivers | |
| parent | b16ec6f735b8f8588c7c3e7703f7ad6267715eb8 (diff) | |
| download | linux-7b0962d32362a0d56627a1dfdb4e8229c5f51f94.tar.bz2 | |
[media] cx88-dvb avoid dangling core->gate_ctrl pointer
dvb_register calls videobuf_dvb_register_bus, but if that returns
a failure the module will be unloaded without clearing the
value of core->gate_ctrl which will cause an oops in macros
called from video_open in cx88-video.c
Signed-off-by: David Fries <David@Fries.net>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Istvan Varga <istvan_v@mailbox.hu>
Cc: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/cx88/cx88-dvb.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c index cf3d33ab541b..396149824fcd 100644 --- a/drivers/media/video/cx88/cx88-dvb.c +++ b/drivers/media/video/cx88/cx88-dvb.c @@ -954,6 +954,7 @@ static int dvb_register(struct cx8802_dev *dev) struct cx88_core *core = dev->core; struct videobuf_dvb_frontend *fe0, *fe1 = NULL; int mfe_shared = 0; /* bus not shared by default */ + int res = -EINVAL; if (0 != core->i2c_rc) { printk(KERN_ERR "%s/2: no i2c-bus available, cannot attach dvb drivers\n", core->name); @@ -1566,13 +1567,16 @@ static int dvb_register(struct cx8802_dev *dev) call_all(core, core, s_power, 0); /* register everything */ - return videobuf_dvb_register_bus(&dev->frontends, THIS_MODULE, dev, - &dev->pci->dev, adapter_nr, mfe_shared, NULL); + res = videobuf_dvb_register_bus(&dev->frontends, THIS_MODULE, dev, + &dev->pci->dev, adapter_nr, mfe_shared, NULL); + if (res) + goto frontend_detach; + return res; frontend_detach: core->gate_ctrl = NULL; videobuf_dvb_dealloc_frontends(&dev->frontends); - return -EINVAL; + return res; } /* ----------------------------------------------------------- */ |