i was browsing the change history of spidev when i noticed the change:
aaacf4bb51b243875b203e6ff73b5047636b4efa spi: avoid spidev crash when
device is removed

which seems to be due to this change:
3d81252ddb10f63ae4db713d9b32faabe641b850 device create: spi: convert
device_create to device_create_drvdata

getting an incomplete revert with this change:
a9b12619f7b6f19c871437ec24a088787a04b1de device create: misc: convert
device_create_drvdata to device_create

my point being is that the original code was doing the
spi_set_drvdata() while holding the device_list_lock mutex while the
new one is not.  shouldnt the code be changed back to the state
previous to 3d81252d ?
-mike

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