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author | Milton Miller <miltonm@bga.com> | 2011-05-18 10:27:39 -0500 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-18 10:19:36 -0600 |
commit | 01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 (patch) | |
tree | 98707dfac7c9533dbfef30c4ff05c0dfdabc17a6 /drivers/atm/fore200e.c | |
parent | 2e9521fd656f05a716b5294a7dbebd37ced05e43 (diff) | |
download | op-kernel-dev-01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6.zip op-kernel-dev-01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6.tar.gz |
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>
Diffstat (limited to 'drivers/atm/fore200e.c')
0 files changed, 0 insertions, 0 deletions