Re: DSS2 crash with shutdown -h now

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On Tue, Oct 19, 2010 at 9:42 PM, Taneja, Archit <archit@xxxxxx> wrote:
> Hi,
>
> linux-omap-owner@xxxxxxxxxxxxxxx wrote:
>> I'm using a 2.6.35 kernel, and the generic panel driver.
>>
>> I see this crash about 25% of the time, so I suspect a race condition.
>>
>> Is anyone else encountering this?
>>
>> Steve
>>
>>
>> Unmounting local filesystems...
>> Unhandled fault: external abort on non-linefetch (0x1028) at
>> 0xfa050040 Internal error: : 1028 [#1] last sysfs file:
>> /sys/devices/virtual/vc/vcs12/uevent
>> Modules linked in: ipv6 uvcvideo videodev v4l1_compat ads7846
>> CPU: 0    Not tainted  (2.6.35 #1)
>> PC is at dss_select_dispc_clk_source+0x20/0x40
>> LR is at omapdss_dpi_display_disable+0x20/0x50
>> pc : [<c01f74d4>]    lr : [<c01ffc80>]    psr: 60000013
>> sp : ded59e38  ip : 00000090  fp : 00000001
>> r10: 00000001  r9 : ded58000  r8 : c0032084
>> r7 : ded59e50  r6 : 00000000  r5 : c01fcc28  r4 : c057da00
>> r3 : 00000000  r2 : fa050000  r1 : c05d062c  r0 : 00000002
>> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
>> Control: 10c5387d  Table: 9ed84019  DAC: 00000015 Process
>> halt (pid: 503, stack limit = 0xded582f0)
>> Stack: (0xded59e38 to 0xded5a000)
>> 9e20:
>> c057da00 c020a430
>> 9e40: 00000000 c01fcc48 ded59e50 c022f424 dfc3fc78 dfccc170
>> dfe02400 c057d4cc
>> 9e60: c057d4c0 c05d4fac 00000000 c0230ba4 c0575de0 c022c6f8 28121969 cdef0123
>> 9e80: fee1dead c0065d58 28121969 c0065ed4 00000014 dfc17dd8 00000001 dfc299c0
>> 9ea0: 00000000 ded59eb0 c0062ee4 c00546f0 000a4800 a0000013 00000000 ded59f08
>> 9ec0: 00000001 00000014 ded58000 00000001 00000001 c0063068 00000000 ded59f08
>> 9ee0: dfc299c0 dfc18500 ded59f08 00000014 ded58000 c0063cb8 00000001 00000000
>> 9f00: 00000006 c0063d2c 00000014 00000164 00000000 000001f7 00000000 dfc299f8
>> 9f20: 00000164 dfc299f0 c057f598 00000000 00000000 fffffffd 00000000 c006e810
>> 9f40: ded59f6c 00000000 dfc299c0 c0052fbc dfc299c0 dff16e00
>> dec41080 dec92540
>> 9f60: ded59fac ded59f70 c03e841c c0052f90 ffffff9c c0031f58
>> dec927a8 ded58000
>> 9f80: 00000000 00000000 00000000 00000006 00000025 00000000 00000000 00000006
>> 9fa0: 00000058 c0031f00 00000000 00000000 fee1dead 28121969 4321fedc 00000000
>> 9fc0: 00000000 00000000 00000006 00000058 00000001 00000001 00000001 00000001
>> 9fe0: 00011e50 bef36cb0 0000925c 400e23f8 20000010 fee1dead
>> 00000000 00000000 [<c01f74d4>]
>> (dss_select_dispc_clk_source+0x20/0x40) from [<c01ffc80>]
>> (omapdss_dpi_display_disable+0x20/0x50)
>> [<c01ffc80>] (omapdss_dpi_display_disable+0x20/0x50) from [<c020a430>]
>> (generic_panel_disable+0xc/0x18)
>> [<c020a430>] (generic_panel_disable+0xc/0x18) from [<c01fcc48>]
>> (dss_disable_device+0x20/0x2c)
>> [<c01fcc48>] (dss_disable_device+0x20/0x2c) from [<c022f424>]
>> (bus_for_each_dev+0x4c/0x8c) [<c022f424>] (bus_for_each_dev+0x4c/0x8c) from
>> [<c0230ba4>] (platform_drv_shutdown+0x1c/0x24)
>> [<c0230ba4>] (platform_drv_shutdown+0x1c/0x24) from [<c022c6f8>]
>> (device_shutdown+0x70/0x94) [<c022c6f8>] (device_shutdown+0x70/0x94) from
>> [<c0065d58>] (kernel_halt+0x10/0x2c) [<c0065d58>] (kernel_halt+0x10/0x2c)
>> from [<c0065ed4>] (sys_reboot+0x118/0x1dc) [<c0065ed4>]
>> (sys_reboot+0x118/0x1dc) from [<c0031f00>]
>> (ret_fast_syscall+0x0/0x30)
>> Code: e5833000 eafffffd e59f101c e5912000 (e5923040)
>> OMAPFB: pan_display(0)
>> OMAPFB: setcmap
>> OMAPFB: setcmap
>> OMAPFB: setcmap
>
> Are you running a fb app while shutting down?

My test method is to use a relatively minimal rootfs.  It does launch
a console session on the fb using a USB KB on musb, which sits at the
login prompt throughout the test.  I do not login via this console
session.

I login via serial port, wait till uptime reports 10 minutes, then
issue 'shutdown -h now'

Steve
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