** Changed in: linux (Ubuntu Bionic)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1787945
Title:
Tango platform uses __initcall without further checks
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
Fix Committed
Bug description:
Impact:
The TANGO platform (an embedded soc used in home entertainment,
connectivity and control devices) is enabled by default in the generic
arm kernel. During kernel bootup, the tango platform blindly registers
its pm ops in arch/arm/mach-tango/pm.c via initcalls() (without
checking whether it's actually running on the correspondent hardware)
and this causes OOPS during suspend on tegra platforms since the tango
pm .enter function directly pokes the underlying hardware.
Given the narrow scope of this SOC, i propose to disable support for
the TANGO arch.
Fix:
Apply the attached patch and recompile.
How to test:
Suspend the tegra board and chek that it worked - either close the laptop
lid, 'systemctl suspend' or:
# echo -n mem > /sys/power/state
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