[REPORT] net: e100: possible data races

[Jia-Ju Bai]

CPU0:
e100_set_multicast_list
  e100_exec_cb
    line 854: spin_lock_irqsave()
    line 866: e100_configure (function pointer)
      line 1114: nic->flags [READ]
      line 1123: nic->flags [READ]

CPU1:
e100_watchdog
  line 1731: nic->flags [WRITE]
  line 1733: nic->flags [WRITE]

As for nic->flags, the WRITE operations in CPU0 are performed
with holding a spinlock, but the READ operations in CPU1 are performed
without holding this spinlock, so there may exist data races.

These possible races are detected by a runtime testing.
I do not find a good way to fix these races, so I only report them.


Best wishes,
Jia-Ju Bai