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drivercore: revert addition of of_match to struct device

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Commit b826291c, "drivercore/dt: add a match table pointer to struct
device" added an of_match pointer to struct device to cache the
of_match_table entry discovered at driver match time.  This was unsafe
because matching is not an atomic operation with probing a driver.  If
two or more drivers are attempted to be matched to a driver at the
same time, then the cached matching entry pointer could get
overwritten.

This patch reverts the of_match cache pointer and reworks all users to
call of_match_device() directly instead.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely
2011-05-18 11:19:24 -06:00
parent 01294d8262
commit b1608d69cb
22 changed files with 108 additions and 50 deletions
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include/linux/device.h
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@@ -442,7 +442,6 @@ struct device {
struct dev_archdata archdata;
struct device_node *of_node; /* associated device tree node */
const struct of_device_id *of_match; /* matching of_device_id from driver */
dev_t devt; /* dev_t, creates the sysfs "dev" */