Re: [PATCH 2/2] dmaengine: OMAP: Register SDMA controller with Device Tree DMA driver

[Tony Lindgren <tony@atomide.com>]

* Jon Hunter <jon-hunter@ti.com> [130207 16:55]:
> 
> Ugh, looks like linux-next is broken for omap2+ boards at the moment
> and is panic'ing in the twl i2c code ... some else to look into ...
> 
> Peter have you seen this on linux-next? I am seeing this on omap2-4 boards.

Does not happen with arm-soc/for-next, probably related to the
drivers/mfd/*twl* changes?

Tony
 
> [    2.286132] Unable to handle kernel NULL pointer dereference at virtual address 00000000
> [    2.294738] pgd = c0004000
> [    2.297576] [00000000] *pgd=00000000
> [    2.301361] Internal error: Oops: 5 [#1] SMP ARM
> [    2.306243] Modules linked in:
> [    2.309448] CPU: 0    Not tainted  (3.8.0-rc6-next-20130207-00016-g735c237 #35)
> [    2.317169] PC is at twl_i2c_read+0x3c/0xec
> [    2.321563] LR is at twl_i2c_read+0x1c/0xec
> [    2.325988] pc : [<c0333950>]    lr : [<c0333930>]    psr: 80000153
> [    2.325988] sp : c702fed0  ip : 00000000  fp : 00000000
> [    2.338043] r10: c702e000  r9 : c06e84e8  r8 : c06e51c8
> [    2.343536] r7 : 00000001  r6 : 00000006  r5 : c702fef6  r4 : 00000004
> [    2.350402] r3 : c129508c  r2 : 00000006  r1 : c702fef6  r0 : 0000000e
> [    2.357269] Flags: Nzcv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment kernel
> [    2.365051] Control: 10c5387d  Table: 80004019  DAC: 00000017
> [    2.371093] Process swapper/0 (pid: 1, stack limit = 0xc702e240)
> [    2.377410] Stack: (0xc702fed0 to 0xc7030000)
> [    2.382019] fec0:                                     c0d42180 c0d429d0 c70a7640 c07354c4
> [    2.390624] fee0: 00000001 c0719798 c0d42180 c06f2cc0 c04e76cc c06ee1ac 00000000 c07354c4
> [    2.399230] ff00: 00000007 c06f2d64 00000017 c06fb308 00000000 c06f07a4 c0cb8580 c06edee0
> [    2.407836] ff20: c06eded4 c06e8504 c0d42180 c0008768 0000009e c00611b4 00000001 00000000
> [    2.416442] ff40: c061994c c06b7548 00000007 00000007 00000000 c07354c4 00000007 c0719798
> [    2.425048] ff60: c0d42180 c06e51c8 c07197a0 0000009e 00000000 c06e590c 00000007 00000007
> [    2.433654] ff80: c06e51c8 00000000 00000000 c04d26ec 00000000 00000000 00000000 00000000
> [    2.442260] ffa0: 00000000 c04d26f4 00000000 c00137b0 00000000 00000000 00000000 00000000
> [    2.450866] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> [    2.459472] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000 80fb6c10 71bbcd20
> [    2.468078] [<c0333950>] (twl_i2c_read+0x3c/0xec) from [<c06f2cc0>] (omap3_twl_set_sr_bit+0x3c/0xb4)
> [    2.477722] [<c06f2cc0>] (omap3_twl_set_sr_bit+0x3c/0xb4) from [<c06f2d64>] (omap3_twl_init+0x2c/0x70)
> [    2.487518] [<c06f2d64>] (omap3_twl_init+0x2c/0x70) from [<c06fb308>] (omap_pmic_late_init+0x18/0x24)
> [    2.497222] [<c06fb308>] (omap_pmic_late_init+0x18/0x24) from [<c06f07a4>] (omap2_common_pm_late_init+0x18/0xd0)
> [    2.507934] [<c06f07a4>] (omap2_common_pm_late_init+0x18/0xd0) from [<c06edee0>] (omap3_init_late+0xc/0x18)
> [    2.518188] [<c06edee0>] (omap3_init_late+0xc/0x18) from [<c06e8504>] (init_machine_late+0x1c/0x28)
> [    2.527740] [<c06e8504>] (init_machine_late+0x1c/0x28) from [<c0008768>] (do_one_initcall+0x100/0x16c)
> [    2.537536] [<c0008768>] (do_one_initcall+0x100/0x16c) from [<c06e590c>] (kernel_init_freeable+0xfc/0x1c8)
> [    2.547698] [<c06e590c>] (kernel_init_freeable+0xfc/0x1c8) from [<c04d26f4>] (kernel_init+0x8/0xe4)
> [    2.557250] [<c04d26f4>] (kernel_init+0x8/0xe4) from [<c00137b0>] (ret_from_fork+0x14/0x24)
> 
> Cheers
> Jon