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941da3e0da
fix this bug: [ 2.300817] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 2.308902] pgd = c0404000 [ 2.311615] [00000000] *pgd=00000000 [ 2.315198] Internal error: Oops: 5 [#1] PREEMPT SMP [ 2.320157] CPU: 1 Not tainted (3.0.8+ #70) [ 2.324689] PC is at cpufreq_stat_notifier_trans+0x40/0xa8 [ 2.330169] LR is at notifier_call_chain+0x2c/0x70 [ 2.334954] pc : [<c06ce1d4>] lr : [<c0481440>] psr: 80000013 [ 2.334959] sp : eee47e50 ip : c0a13104 fp : 30a32c00 [ 2.346424] r10: eee47ec8 r9 : 00118c30 r8 : 00000000 [ 2.351641] r7 : fffffffc r6 : 00000000 r5 : ed8c1d80 r4 : 00000000 [ 2.358158] r3 : 00000009 r2 : 000f6180 r1 : 00000000 r0 : 00000000 [ 2.364678] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 2.371976] Control: 10c53c7d Table: 6040404a DAC: 00000015 [ 2.377712] [ 2.924838] [<c06ce1d4>] (cpufreq_stat_notifier_trans+0x40/0xa8) from [<c0481440>] (notifier_call_chain+0x2c/0x70) [ 2.935178] [<c0481440>] (notifier_call_chain+0x2c/0x70) from [<c04815a0>] (__srcu_notifier_call_chain+0x40/0x58) [ 2.945430] [<c04815a0>] (__srcu_notifier_call_chain+0x40/0x58) from [<c04815cc>] (srcu_notifier_call_chain+0x14/0x18) [ 2.956115] [<c04815cc>] (srcu_notifier_call_chain+0x14/0x18) from [<c06cccd8>] (cpufreq_notify_transition+0xb4/0xe8) [ 2.966721] [<c06cccd8>] (cpufreq_notify_transition+0xb4/0xe8) from [<c044b584>] (cpufreq_scale_rate_for_dvfs+0x10c/0x164) [ 2.977755] [<c044b584>] (cpufreq_scale_rate_for_dvfs+0x10c/0x164) from [<c044cb94>] (dvfs_target_cpu+0x378/0x67c) [ 2.988093] [<c044cb94>] (dvfs_target_cpu+0x378/0x67c) from [<c044c1dc>] (dvfs_set_rate+0x48/0x68) [ 2.997044] [<c044c1dc>] (dvfs_set_rate+0x48/0x68) from [<c044b1f0>] (rk30_target+0x1a8/0x200) [ 3.005648] [<c044b1f0>] (rk30_target+0x1a8/0x200) from [<c06cbff0>] (__cpufreq_driver_target+0x4c/0x60) [ 3.015121] [<c06cbff0>] (__cpufreq_driver_target+0x4c/0x60) from [<c06d05ec>] (cpufreq_interactive_up_task+0x128/0x184) [ 3.025981] [<c06d05ec>] (cpufreq_interactive_up_task+0x128/0x184) from [<c047c3d0>] (kthread+0x80/0x88) [ 3.035453] [<c047c3d0>] (kthread+0x80/0x88) from [<c04375f8>] (kernel_thread_exit+0x0/0x8) [ 3.043796] Code: e5956018 e5953010 ea000004 e5951020 (e7911104)