Re: OOPS in OMAP 1-wire driver

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Hi,

I have not seen this crash before. If no slave modules are selected I see a
message that tells with a family ID not registered. But not a crash.

Regards,
Madhu


> I'm not sure this is the right place for 1-wire stuff but I remember
> seeing patches for the OMAP 1w driver so maybe someone is interested.
>
> Running git head on OMAP2430 SDP. Only OMAP master is built into the
> kernel, no slave modules.
> This happens on boot.
>
> Driver for 1-wire Dallas network protocol.
> omap_hdq omap_hdq.0: OMAP HDQ Hardware Rev 0.3. Driver in Interrupt mode
> Unable to handle kernel NULL pointer dereference at virtual address 000000f0
> pgd = c0004000
> [000000f0] *pgd=00000000
> Internal error: Oops: 0 [#1] PREEMPT
> Modules linked in:
> CPU: 0    Not tainted  (2.6.28-rc5-omap1 #21)
> PC is at 0xf0
> LR is at omap_w1_search_bus+0x64/0x70
> pc : [<000000f0>]    lr : [<c01af368>]    psr: 60000013
> sp : c7957f68  ip : c7957f68  fp : c7957f8c
> r10: 00000000  r9 : 00000000  r8 : 00000000
> r7 : 000000f0  r6 : c7829160  r5 : 00000000  r4 : 00000001
> r3 : 3d000000  r2 : 00000001  r1 : 3d000000  r0 : c7829160
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> Control: 00c5387f  Table: 80004000  DAC: 00000017
> Process w1_bus_master1 (pid: 263, stack limit = 0xc7956260)
> Stack: (0xc7957f68 to 0xc7958000)
> 7f60:                   00000001 00000000 c01af304 000000f0 c7956000 000003e8
> 7f80: c7957fa4 c7957f90 c01aed58 c01af310 c7943a00 c7943a00 c7957fbc c7957fa8
> 7fa0: c01ad880 c01aed20 c7943a68 c7943a00 c7957fdc c7957fc0 c01ad958 c01ad830
> 7fc0: c7943a00 c01ad8fc 00000000 00000000 c7957ff4 c7957fe0 c0059fd0 c01ad908
> 7fe0: 00000000 00000000 00000000 c7957ff8 c0048104 c0059f88 ff00ff00 ff00ff00
> Backtrace:
> [<c01af304>] (omap_w1_search_bus+0x0/0x70) from [<c01aed58>]
> (w1_search_devices+0x44/0x50)
>  r7:000003e8 r6:c7956000 r5:000000f0 r4:c01af304
> [<c01aed14>] (w1_search_devices+0x0/0x50) from [<c01ad880>]
> (w1_search_process+0x5c/0xd8)
>  r5:c7943a00 r4:c7943a00
> [<c01ad824>] (w1_search_process+0x0/0xd8) from [<c01ad958>]
> (w1_process+0x5c/0xe0)
>  r5:c7943a00 r4:c7943a68
> [<c01ad8fc>] (w1_process+0x0/0xe0) from [<c0059fd0>] (kthread+0x54/0x80)
>  r7:00000000 r6:00000000 r5:c01ad8fc r4:c7943a00
> [<c0059f7c>] (kthread+0x0/0x80) from [<c0048104>] (do_exit+0x0/0x784)
>  r5:00000000 r4:00000000
> Code: bad PC value.
>
>
> --
> Madness takes it's toll. Please have exact change.
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