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UP2 with nocodec: oops on module remove/insert #259
Description
With the nocodec topology, the existing code generates an oops on insert. It looks like the cleanups are not done right with race conditions and sysfs entries inconsistent. The patch in #255 solves these issues by adding a second unregistration of the machine driver - which works but makes absolutely no sense... Clearly a timing issue that needs to be handled with a proper fix.
dmesg_before_remove.log
dmesg_after_remove.log
dmesg_after_insert.log
Activity
plbossart commentedon Nov 8, 2018
Additional traces show the oops happens on insert - the machine driver is not created and the topology is freed before being created. So the root cause is why the machine driver is not created
and the error w/ sysfs: cannot create duplicate filename '/bus/platform/devices/sof-nocodec'
plbossart commentedon Nov 8, 2018
this is getting beyond my understanding. We are looking at a bad link in sysfs, likely because of a removal done in the wrong order
plbossart commentedon Nov 8, 2018
Solved by unregistering the machine platform device from the SOF core, updated #255
Merge pull request thesofproject#259 from wedsonaf/result
selftest/bpf: Add various selftests for program limits
selftests/bpf: Test bpf_mprog query API via libbpf and raw syscall
selftests/bpf: Test query on empty mprog and pass revision into attach
net: bridge: fix soft lockup in br_multicast_query_expired()
selftests/bpf: Add test for detachment on empty mprog entry
selftests/bpf: Add various more tcx test cases
selftests/bpf: Add additional mprog query test coverage
selftests/bpf: Add selftests for netkit