Re: 3.13-rc3 (commit 7ce93f3) breaks Nokia N900 DT boot

[Sebastian Reichel <sre@ring0.de>]

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On Fri, Dec 06, 2013 at 02:27:25PM -0800, Tony Lindgren wrote:
> * Sebastian Reichel <sre@debian.org> [131206 13:37]:
> > Nokia N900 DT boot breaks for me using 3.13-rc3. You can see the
> > relevant kernel output below. Disabling the AES module in the
> > omap3-n900.dts with status = "disabled" fixed the boot for me.
> 
> OK thanks for letting me know. How about the following patch to
> fix it?

That's basically what I did to fix the problem.

I guess the proper fix would be a runtime check if the device can be
accessed (if that's possible). AFAIK it is possible to use the AES
module on the N900 if the bootloader is slightly patched.

Pali, can you elaborate more about this? I've seen, that you added
a section about this on [0].

[0] http://elinux.org/N900#M-Shield

-- Sebastian

> Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa0c5048
> SMP ARM
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W    3.13.0-rc2+ #446
> task: ce057b40 ti: ce058000 task.ti: ce058000
> PC is at omap_aes_dma_stop+0x24/0x3c
> LR is at omap_aes_probe+0x1cc/0x584
>    psr: 60000113
> sp : ce059e20  ip : ce0b4ee0  fp : 00000000
> r10: c0573ae8  r9 : c0749508  r8 : 00000000
> r7 : ce0b4e00  r6 : 00000000  r5 : ce0b4e10  r4 : ce274890
> r3 : fa0c5048  r2 : 00000048  r1 : 0000002c  r0 : ce274890
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> Control: 10c5387d  Table: 80004019  DAC: 00000015
> Process swapper/0 (pid: 1, stack limit = 0xce058248)
> Stack: (0xce059e20 to 0xce05a000)
> 9e20: c0749508 0000a1ff 00000000 c016cd8c c06b5a06 ce2a45f0 ce2a4570 ce0b5fb0
> 9e40: 00000000 480c5000 480c504f c0abe4e4 00000200 00000000 00000000 00000000
> 9e60: ce0b4e10 ce0b4e10 c082da3c c082da3c c02b8c70 c077c610 c0749508 00000000
> 9e80: 00000000 c02b9e7c c02b9e64 ce0b4e10 00000000 c02b8b20 ce0b4e10 ce0b4e44
> 9ea0: c082da3c c02b8cd8 00000000 ce059eb8 c082da3c c02b7408 ce079edc ce0b1a34
> 9ec0: c082da3c c082da3c ce2a0280 00000000 c08158d8 c02b8358 c0663405 c0663405
> 9ee0: 00000073 c082da3c c079e4e8 c07ab3bc c0844340 c02b9334 00000000 00000006
> 9f00: c079e4e8 c0008920 c067f6bf c0ac7c6b 00000000 c0712e28 00000000 00000000
> 9f20: c0712e38 ce059f38 00000093 c0ac7c82 00000000 c0058994 00000000 c07130e8
> 9f40: c07127b8 00000093 00000006 00000006 00000001 00000006 00000006 c079e4e8
> 9f60: c07ab3bc c0844340 00000093 c0749508 c079e4f4 c0749c64 00000006 00000006
> 9f80: c0749508 00000000 00000000 c0517e2c 00000000 00000000 00000000 00000000
> 9fa0: 00000000 c0517e34 00000000 c000dfb8 00000000 00000000 00000000 00000000
> 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 ffffffff ffffffff
> (omap_aes_probe+0x1cc/0x584)
> (platform_drv_probe+0x18/0x48)
> (driver_probe_device+0xb0/0x200)
> (__driver_attach+0x68/0x8c)
> (bus_for_each_dev+0x50/0x88)
> (bus_add_driver+0xcc/0x1c8)
> (driver_register+0x9c/0xe0)
> (do_one_initcall+0x98/0x140)
> (kernel_init_freeable+0x16c/0x23c)
> (kernel_init+0x8/0x100)
> (ret_from_fork+0x14/0x3c)
> Code: e1811002 e5932020 e590300c e0833002 (e593c000)

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