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Delay in Suspend to low power mode

Question asked by Vishakh M on Dec 16, 2014
Latest reply on Jan 28, 2015 by Vishakh M

Hi All,


We are using linux- release L2.6.35_11.09.01_ER) on i.mx53.


When we enter into low power mode(mem), sometimes system will take around 1 minute delay to suspend.


We found the cause for this issue is in the function "timekeeping_forward_now()" in kernel/time/timekeeping.c file.


In the above function, call to "timespec_add_ns(&raw_time, nsec)" causing the delay in suspend.


Also observed "raw_time.tv_nsec" will have the negative value in the above case.


Is there any patches available to solve this issue?