There are memory leaks reported by kmemleak:
...
unreferenced object 0xffff2020103c3200 (size 256):
comm "insmod", pid 4476, jiffies 4294978252 (age 50072.536s)
hex dump (first 32 bytes):
10 60 40 06 28 20 ff ff 10 c0 59 06 20 20 ff ff .`@.( ....Y. ..
10 e0 47 06 28 20 ff ff 10 00 49 06 28 20 ff ff ..G.( ....I.( ..
backtrace:
[<0000000034ec4724>] __kmem_cache_alloc_node+0x2f8/0x348
[<0000000057fbc15d>] __kmalloc_node_track_caller+0x5c/0x110
[<00000055d5e34b>] krealloc+0x8c/0x178
[<00000000a4635beb>] coresight_alloc_device_name+0x128/0x188 [coresight]
[<00000000a92ddfee>] funnel_cs_ops+0x10/0xfffffffffffedaa0 [coresight_funnel]
[<00000000449e20f8>] dynamic_funnel_ids+0x80/0xfffffffffffed840 [coresight_funnel]
...
when remove driver, the golab variables defined by the macro
DEFINE_CORESIGHT_DEVLIST will be released, dict->nr_idx and
dict->fwnode_list are cleared to 0. The lifetime of the golab
variable has ended. So the buffer pointer is lost.
Use the callback of devm_add_action_or_reset() to free memory.