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| author | Bjørn Mork <bjorn@mork.no> | 2010-03-24 10:30:15 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-05-19 12:57:17 -0300 |
| commit | dd0bbcc626d8baa6821c6cb9c45ecf3759ef8088 (patch) | |
| tree | 8cb1abe3267e5d150adcb657baaf4272439551f2 /drivers/media/dvb/ttpci | |
| parent | 784a493168f71ce02b5f9eab0ec19df29b999631 (diff) | |
| download | kernel_samsung_smdk4412-dd0bbcc626d8baa6821c6cb9c45ecf3759ef8088.tar.gz kernel_samsung_smdk4412-dd0bbcc626d8baa6821c6cb9c45ecf3759ef8088.tar.bz2 kernel_samsung_smdk4412-dd0bbcc626d8baa6821c6cb9c45ecf3759ef8088.zip | |
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>
Diffstat (limited to 'drivers/media/dvb/ttpci')
| -rw-r--r-- | drivers/media/dvb/ttpci/budget.c | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/drivers/media/dvb/ttpci/budget.c b/drivers/media/dvb/ttpci/budget.c index f5db13d8b99..874a10a9d49 100644 --- a/drivers/media/dvb/ttpci/budget.c +++ b/drivers/media/dvb/ttpci/budget.c @@ -628,29 +628,36 @@ static void frontend_init(struct budget *budget) &tt1600_stv6110x_config, &budget->i2c_adap); - tt1600_stv090x_config.tuner_init = ctl->tuner_init; - tt1600_stv090x_config.tuner_sleep = ctl->tuner_sleep; - tt1600_stv090x_config.tuner_set_mode = ctl->tuner_set_mode; - tt1600_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency; - tt1600_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency; - tt1600_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth; - tt1600_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth; - tt1600_stv090x_config.tuner_set_bbgain = ctl->tuner_set_bbgain; - tt1600_stv090x_config.tuner_get_bbgain = ctl->tuner_get_bbgain; - tt1600_stv090x_config.tuner_set_refclk = ctl->tuner_set_refclk; - tt1600_stv090x_config.tuner_get_status = ctl->tuner_get_status; - - /* call the init function once to initialize - tuner's clock output divider and demod's - master clock */ - if (budget->dvb_frontend->ops.init) - budget->dvb_frontend->ops.init(budget->dvb_frontend); - - dvb_attach(isl6423_attach, - budget->dvb_frontend, - &budget->i2c_adap, - &tt1600_isl6423_config); - + if (ctl) { + tt1600_stv090x_config.tuner_init = ctl->tuner_init; + tt1600_stv090x_config.tuner_sleep = ctl->tuner_sleep; + tt1600_stv090x_config.tuner_set_mode = ctl->tuner_set_mode; + tt1600_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency; + tt1600_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency; + tt1600_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth; + tt1600_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth; + tt1600_stv090x_config.tuner_set_bbgain = ctl->tuner_set_bbgain; + tt1600_stv090x_config.tuner_get_bbgain = ctl->tuner_get_bbgain; + tt1600_stv090x_config.tuner_set_refclk = ctl->tuner_set_refclk; + tt1600_stv090x_config.tuner_get_status = ctl->tuner_get_status; + + /* call the init function once to initialize + tuner's clock output divider and demod's + master clock */ + if (budget->dvb_frontend->ops.init) + budget->dvb_frontend->ops.init(budget->dvb_frontend); + + if (dvb_attach(isl6423_attach, + budget->dvb_frontend, + &budget->i2c_adap, + &tt1600_isl6423_config) == NULL) { + printk(KERN_ERR "%s: No Intersil ISL6423 found!\n", __func__); + goto error_out; + } + } else { + printk(KERN_ERR "%s: No STV6110(A) Silicon Tuner found!\n", __func__); + goto error_out; + } } } break; |