linux-kernel - [BUG] cros_ec_debugfs causes a WARNING trace during suspend on ASUS C201

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Message-ID: <CAPCnQJ=zoWFU7YESpONjwRC4ccVo_StYbY=dgait-Yp4Ptb5=Q@mail.gmail.com>
Date:   Tue, 19 Mar 2019 12:36:21 +0200
From:   Urja Rannikko <urjaman@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     bleung@...omium.org, enric.balletbo@...labora.com,
        groeck@...omium.org
Subject: [BUG] cros_ec_debugfs causes a WARNING trace during suspend on ASUS C201

Hi,

I was testing 5.1-rc1 on my C201 when i found this, dmesg of a
suspend/resume attached.

Based on a quick look at the code it looks like the reason is that the
suspend and resume calls try to cancel/schedule log_poll_work
unconditionally but this device doesnt support reading the console log
so the delayed work struct was never initialized.

-- 
Urja Rannikko

View attachment "suspend_cros_ec_debugfs.txt" of type "text/plain" (13178 bytes)