Messages in this thread |  | | Date | Sun, 4 Feb 2018 19:29:54 +0300 | From | Alexander Sergeyev <> | Subject | Re: PROBLEM: NULL pointer dereference in dell_set_arguments() in 4.15 |
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>To make dell_micmute_led_set() work properly we need to ensure that either WMI >or SMM driver is already loaded and initialized.
From the looks of the call trace dell_micmute_led_set() is called from device phase of initialization. Which means that there is a use of dell-laptop interface while the module is not initialized (since late_initcall). Previously, this led to crashes.
But dell_micmute_led_set() does not touch the module state now, so nothing is technically broken; dell-smbios and dell-smbios-smm use subsys_initcall, so they are ready. But WMI driver is in the same phase with intel hda, so there might be something there.
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