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29 July 2024, 15:18:00 UTC
Revision 01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 authored by Milton Miller on 18 May 2011, 15:27:39 UTC, committed by Grant Likely on 18 May 2011, 16:19:36 UTC 
of: fix race when matching drivers
 
If two drivers are probing devices at the same time, both will write
their match table result to the dev->of_match cache at the same time.

Only write the result if the device matches.

In a thread titled "SBus devices sometimes detected, sometimes not",
Meelis reported his SBus hme was not detected about 50% of the time.
From the debug suggested by Grant it was obvious another driver matched
some devices between the call to match the hme and the hme discovery
failling.

Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Milton Miller <miltonm@bga.com>
[grant.likely: modified to only call of_match_device() once]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
1 parent 2e9521f
History
Tip revision: 01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 authored by Milton Miller on 18 May 2011, 15:27:39 UTC
of: fix race when matching drivers
Tip revision: 01294d8
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