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authorMilton Miller <miltonm@bga.com>2011-05-18 10:27:39 -0500
committerGrant Likely <grant.likely@secretlab.ca>2011-05-18 10:19:36 -0600
commit01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 (patch)
tree98707dfac7c9533dbfef30c4ff05c0dfdabc17a6 /drivers/atm
parent2e9521fd656f05a716b5294a7dbebd37ced05e43 (diff)
downloadlinux-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')
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