Re: MFD USB host: prevents CORE retention in idle

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Hi Keshava,

On Fri, Jun 15, 2012 at 2:04 PM, Munegowda, Keshava
<keshava_mgowda@xxxxxx> wrote:
> On Tue, Jun 12, 2012 at 6:28 PM, Munegowda, Keshava
> <keshava_mgowda@xxxxxx> wrote:
>> hi kevin
>>         now I am using initramfs with kernel linux3.5.rc1,
>> but the retention is not working in 3430 sdp.  I am seeing the following
>> error followed by a crash
>>
>>
>> echo mem > /sys/power/state
>> [   35.609252] PM: Syncing filesystems ... done.
>> [   35.614654] PM: Preparing system for mem sleep
>> [   35.658630] Freezing user space processes ... (elapsed 0.01 seconds)
>> done.
>> [   35.689727] Freezing remaining freezable tasks ... (elapsed 0.02 seconds)
>> done.
>> [   35.697692] PM: Entering mem sleep
>> [   35.722442] usb usb1: usb auto-resume
>> [   35.726409] ehci-omap ehci-omap.0: resume root hub
>> [   35.775451] hub 1-0:1.0: hub_resume
>> [   35.779846] hub 1-0:1.0: hub_suspend
>> [   35.784240] usb usb1: bus suspend, wakeup 0
>> [   35.788665] ehci-omap ehci-omap.0: suspend root hub
>> [   35.805786] PM: suspend of devices complete after 99.304 msecs
>> [   35.816497] PM: late suspend of devices complete after 4.364 msecs
>> [   35.831573] PM: noirq suspend of devices complete after 8.331 msecs
>> [   35.838500] Disabling non-boot CPUs ...
>> [   36.312164] Powerdomain (core_pwrdm) didn't enter target state 1
>> [   36.318481] Could not enter target state in pm_suspend
>> [   36.324859] Unable to handle kernel NULL pointer dereference at virtual
>> address 00000018
>> [   36.333557] pgd = c6280000
>> [   36.336639] [00000018] *pgd=85c8f831, *pte=00000000, *ppte=00000000
>> [   36.343414] Internal error: Oops: 17 [#1] SMP ARM
>> [   36.348388] Modules linked in:
>> [   36.351623] CPU: 0    Tainted: G        W     (3.5.0-rc1 #1)
>> [   36.357574] PC is at _od_resume_noirq+0x14/0x58
>> [   36.362365] LR is at dpm_run_callback+0x2c/0x74

You need the fix from
https://gitorious.org/linux-omap-dss2/linux/commit/9e0ca55fa5d9ff012964a7c7cef8af1b814b2fdb

Hope this helps!

Regards,
Jean
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