On Thursday 26 February 2009, Liam Girdwood wrote: > > > > Semi-related: someone with time to spend on it might > > find and fix the bug causing the regulator framework > > to oops when regulator/core.c::set_machine_constraints() > > returns an error code. > > Any chance you can post the oops. Is it happening within the > set_constraints() error path or sometime later on ? Later, after it returns. This particular oops went away with the tweak eliminating the need for pointless init of constraints for fixed voltage (1.8V in this case) regulators. - Dave <3>set_machine_constraints: invalid 'VUSB1V8' voltage constraints <1>Unable to handle kernel NULL pointer dereference at virtual address 00000004 <1>pgd = c0004000 <1>[00000004] *pgd=00000000 Internal error: Oops: 805 [#1] PREEMPT CPU: 0 Not tainted (2.6.29-rc6-omap1 #517) PC is at kobj_kset_leave+0x34/0x5c LR is at _spin_lock+0x50/0x58 pc : [<c01748a0>] lr : [<c0336e84>] psr: 20000013 sp : c7821978 ip : c7821950 fp : c782198c r10: c785f8a8 r9 : c7888a08 r8 : c78dade0 r7 : ffffffea r6 : 00000000 r5 : c785f8a8 r4 : c785f908 r3 : 00000000 r2 : c7888a6c r1 : c785f90c r0 : c7815308 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c5387f Table: 80004019 DAC: 00000017 Process swapper (pid: 1, stack limit = 0xc78202e8) Stack: (0xc7821978 to 0xc7822000) 1960: c785f908 c785f8a8 1980: ... deletia ... 1fe0: 00000000 00000000 00000000 c7821ff8 c004d6c8 c0008668 8b77de58 01fbdd0a Backtrace: [<c017486c>] (kobj_kset_leave+0x0/0x5c) from [<c01748f4>] (kobject_del+0x2c/0x40) r5:c785f8a8 r4:c785f908 [<c01748c8>] (kobject_del+0x0/0x40) from [<c01a94fc>] (device_del+0x158/0x170) r5:c785f8a8 r4:c785f908 [<c01a93a4>] (device_del+0x0/0x170) from [<c01a9528>] (device_unregister+0x14/0x20) r7:ffffffea r6:c785f808 r5:c0437150 r4:c785f8a8 [<c01a9514>] (device_unregister+0x0/0x20) from [<c0188614>] (regulator_register+0x208/0x248) r5:c0437150 r4:c785f800 [<c018840c>] (regulator_register+0x0/0x248) from [<c0189894>] (twl4030reg_probe+0xa4/0x108) [<c01897f0>] (twl4030reg_probe+0x0/0x108) from [<c01ac778>] (platform_drv_probe+0x20/0x24) r6:c04371b0 r5:c7888a08 r4:c04371b0 [<c01ac758>] (platform_drv_probe+0x0/0x24) from [<c01ab920>] (really_probe+0x9c/0x148) [<c01ab884>] (really_probe+0x0/0x148) from [<c01aba20>] (driver_probe_device+0x54/0x58) r7:c7888a68 r6:c7888a08 r5:c7888a08 r4:c04371b0 [<c01ab9cc>] (driver_probe_device+0x0/0x58) from [<c01abac0>] (__device_attach+0x10/0x14) r5:c01abab0 r4:00000000 [<c01abab0>] (__device_attach+0x0/0x14) from [<c01aae9c>] (bus_for_each_drv+0x50/0x84) [<c01aae4c>] (bus_for_each_drv+0x0/0x84) from [<c01abb48>] (device_attach+0x58/0x70) r6:00000000 r5:c7888aac r4:c7888a08 [<c01abaf0>] (device_attach+0x0/0x70) from [<c01aacb8>] (bus_attach_device+0x30/0x64) r5:c7888a08 r4:c043b3f8 [<c01aac88>] (bus_attach_device+0x0/0x64) from [<c01a9830>] (device_add+0x148/0x284) r5:c7886820 r4:c7888a08 [<c01a96e8>] (device_add+0x0/0x284) from [<c01ace24>] (platform_device_add+0xf8/0x150) r7:c7888a8c r6:c7888a00 r5:00000000 r4:00000000 [<c01acd2c>] (platform_device_add+0x0/0x150) from [<c01b0714>] (add_numbered_child+0xe4/0x130) r7:00000120 r6:c7821bc0 r5:c7888a00 r4:00000000 [<c01b0630>] (add_numbered_child+0x0/0x130) from [<c01b07b0>] (add_regulator_linked+0x50/0x5c) [<c01b0760>] (add_regulator_linked+0x0/0x5c) from [<c01b09f8>] (add_children+0x220/0x2d4) [<c01b07d8>] (add_children+0x0/0x2d4) from [<c01b0eac>] (twl4030_probe+0x148/0x174) r8:c08010f4 r7:c041e848 r6:c7886200 r5:00000004 r4:00000178 [<c01b0d64>] (twl4030_probe+0x0/0x174) from [<c01cf6dc>] (i2c_device_probe+0x70/0x88) [<c01cf66c>] (i2c_device_probe+0x0/0x88) from [<c01ab920>] (really_probe+0x9c/0x148) r7:c7886280 r6:c043b6f8 r5:c7886220 r4:c043b6f8 [<c01ab884>] (really_probe+0x0/0x148) from [<c01aba20>] (driver_probe_device+0x54/0x58) r7:c7886280 r6:c7886220 r5:c7886220 r4:c043b6f8 [<c01ab9cc>] (driver_probe_device+0x0/0x58) from [<c01abac0>] (__device_attach+0x10/0x14) r5:c01abab0 r4:00000000 [<c01abab0>] (__device_attach+0x0/0x14) from [<c01aae9c>] (bus_for_each_drv+0x50/0x84) [<c01aae4c>] (bus_for_each_drv+0x0/0x84) from [<c01abb48>] (device_attach+0x58/0x70) r6:00000000 r5:c78862c4 r4:c7886220 [<c01abaf0>] (device_attach+0x0/0x70) from [<c01aacb8>] (bus_attach_device+0x30/0x64) r5:c7886220 r4:c043d558 [<c01aac88>] (bus_attach_device+0x0/0x64) from [<c01a9830>] (device_add+0x148/0x284) r5:c785ecf8 r4:c7886220 [<c01a96e8>] (device_add+0x0/0x284) from [<c01a9988>] (device_register+0x1c/0x20) r7:00000000 r6:c785ec50 r5:c7886200 r4:c7886220 [<c01a996c>] (device_register+0x0/0x20) from [<c01d069c>] (i2c_attach_client+0xc0/0x150) r5:c7886200 r4:c7886220 [<c01d05dc>] (i2c_attach_client+0x0/0x150) from [<c01d0d48>] (i2c_new_device+0x64/0x84) r7:c0420c90 r6:c785ec50 r5:c78064cc r4:c7886200 [<c01d0ce4>] (i2c_new_device+0x0/0x84) from [<c01d1388>] (i2c_scan_static_board_info+0x44/0x8c) r7:c0420c90 r6:00000000 r5:c785ec50 r4:c78064c0 [<c01d1344>] (i2c_scan_static_board_info+0x0/0x8c) from [<c01d145c>] (i2c_register_adapter+0x8c/0x144) r5:c785ec50 r4:00000000 [<c01d13d0>] (i2c_register_adapter+0x0/0x144) from [<c01d15b4>] (i2c_add_numbered_adapter+0xa0/0xb8) r5:c785ec50 r4:00000000 [<c01d1514>] (i2c_add_numbered_adapter+0x0/0xb8) from [<c0018c60>] (omap_i2c_probe+0x254/0x304) r5:c0420858 r4:c785ec00 [<c0018a0c>] (omap_i2c_probe+0x0/0x304) from [<c01ac778>] (platform_drv_probe+0x20/0x24) r8:00000001 r7:c043b3f8 r6:c043d7c8 r5:c0420860 r4:c043d7c8 [<c01ac758>] (platform_drv_probe+0x0/0x24) from [<c01ab920>] (really_probe+0x9c/0x148) [<c01ab884>] (really_probe+0x0/0x148) from [<c01aba20>] (driver_probe_device+0x54/0x58) r7:c043b3f8 r6:c043d7c8 r5:c0420860 r4:c043d7c8 [<c01ab9cc>] (driver_probe_device+0x0/0x58) from [<c01aba8c>] (__driver_attach+0x68/0x8c) r5:c0420904 r4:c0420860 [<c01aba24>] (__driver_attach+0x0/0x8c) from [<c01ab170>] (bus_for_each_dev+0x4c/0x80) r7:c043b3f8 r6:c043d7c8 r5:c01aba24 r4:00000000 [<c01ab124>] (bus_for_each_dev+0x0/0x80) from [<c01ab79c>] (driver_attach+0x20/0x28) r6:c7887300 r5:00000000 r4:c043d7c8 [<c01ab77c>] (driver_attach+0x0/0x28) from [<c01aaaec>] (bus_add_driver+0xa4/0x170) [<c01aaa48>] (bus_add_driver+0x0/0x170) from [<c01abd40>] (driver_register+0x98/0xcc) r7:c0018970 r6:00000000 r5:00000000 r4:c043d7c8 [<c01abca8>] (driver_register+0x0/0xcc) from [<c01accb0>] (platform_driver_register+0x6c/0x88) r5:00000000 r4:c0023fd8 [<c01acc44>] (platform_driver_register+0x0/0x88) from [<c0018984>] (omap_i2c_init_driver+0x14/0x1c) [<c0018970>] (omap_i2c_init_driver+0x0/0x1c) from [<c002923c>] (__exception_text_end+0x5c/0x1a0) [<c00291e0>] (__exception_text_end+0x0/0x1a0) from [<c000861c>] (do_initcalls+0x1c/0x38) r8:00000000 r7:00000000 r6:00000000 r5:00000000 r4:c0023fd8 [<c0008600>] (do_initcalls+0x0/0x38) from [<c0008658>] (do_basic_setup+0x20/0x24) r5:00000000 r4:c044b640 [<c0008638>] (do_basic_setup+0x0/0x24) from [<c00086b0>] (kernel_init+0x54/0xa8) [<c000865c>] (kernel_init+0x0/0xa8) from [<c004d6c8>] (do_exit+0x0/0x254) r4:00000000 Code: e5942008 e5943004 e2841004 e5823000 (e5832004) <4>---[ end trace 1b75b31a2719ed1c ]--- <6>note: swapper[1] exited with preempt_count 2 <0>Kernel panic - not syncing: Attempted to kill init! -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to 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