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SubjectRe: [PATCH v2] serial: imx: fix endless loop during suspend
Hi Martin,

On Fri, Jan 5, 2018 at 2:46 PM, Martin Kaiser <martin@kaiser.cx> wrote:

> Hi Fabio and all,
>
> here's a different approach for fixing the awake issue that I see on my
> board. I tried to stick as much as possible to the original order in
> which the operations were done. Could you do a quick check on imx6q?

suspend_stats looks better now:

# cat /sys/kernel/debug/suspend_stats
success: 8
fail: 0
failed_freeze: 0
failed_prepare: 0
failed_suspend: 0
failed_suspend_late: 0
failed_suspend_noirq: 0
failed_resume: 0
failed_resume_early: 0
failed_resume_noirq: 0
failures:
last_failed_dev:

last_failed_errno: 0
0
last_failed_step:

However the board is still automatically returning from resume (I
haven't entered any char in the console)

# echo mem > /sys/power/state
[ 186.723470] PM: suspend entry (deep)
[ 186.727107] PM: Syncing filesystems ... done.
[ 186.735016] Freezing user space processes ... (elapsed 0.001 seconds) done.
[ 186.743640] OOM killer disabled.
[ 186.746888] Freezing remaining freezable tasks ... (elapsed 0.001
seconds) done.
[ 186.756174] Suspending console(s) (use no_console_suspend to debug)
[ 186.828645] PM: suspend devices took 0.060 seconds
[ 186.837771] Disabling non-boot CPUs ...
[ 187.014044] Enabling non-boot CPUs ...
[ 187.015057] CPU1 is up
[ 187.016003] CPU2 is up
[ 187.016988] CPU3 is up
[ 187.294341] mmc0: queuing unknown CIS tuple 0x80 (2 bytes)
[ 187.296228] mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
[ 187.298111] mmc0: queuing unknown CIS tuple 0x80 (3 bytes)
[ 187.301490] mmc0: queuing unknown CIS tuple 0x80 (7 bytes)
[ 187.304873] mmc0: queuing unknown CIS tuple 0x80 (7 bytes)
[ 187.354759] ata1: SATA link down (SStatus 0 SControl 300)
[ 187.359840] PM: resume devices took 0.340 seconds
[ 187.417332] OOM killer enabled.
[ 187.420487] Restarting tasks ... done.
[ 187.425435] PM: suspend exit

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