i.MX6 Solo Android 5.0 boot fail

[m_c]

We add nosmp in kernel parameter, but boot still fail.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 80004000
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.10.53-88204-g4f0dd92-dirty #4
task: 9c06c000 ti: 9c06a000 task.ti: 9c06a000
PC is at bitmap_clear+0xb0/0xc8
LR is at __arm_dma_free.isra.15+0xf0/0x234
pc : [<8031b984>] lr : [<800180a4>] psr: 20000193
sp : 9c06be00 ip : ffffffff fp : 00000000
r10: 80eddae0 r9 : 00000000 r8 : 000effff
r7 : fffffff0 r6 : 00000010 r5 : 00000000 r4 : ffffffff
r3 : 00000010 r2 : 0000ffff r1 : 00000000 r0 : 00000000
Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c53c7d Table: 1000404a DAC: 00000015

Original Attachment has been moved to: 2016-11-18-consol-imx6solo.txt.zip

[igorpadykov · Accepted solution]

Hi m.c.

one can try to decrease cma size (now it is 320MB) for 512MB board

ddr, please check imx_v7_defconfig. Also had customer passed ddr test

https://community.freescale.com/docs/DOC-105652 

and rebult image with new calibration coefficients found from test.

Best regards
igor
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[leoyeh]

Hello Igor:

Thank you very much. The kernel works after I reduce the cma down to 192M.

Leo