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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 <[email protected]>
This commit is contained in:
Grant Likely 2011-05-18 11:19:24 -06:00
commit b1608d69cb
22 changed files with 108 additions and 50 deletions
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2
drivers/edac/ppc4xx_edac.c
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@ -1019,7 +1019,7 @@ ppc4xx_edac_mc_init(struct mem_ctl_info *mci,
struct ppc4xx_edac_pdata *pdata = NULL;
const struct device_node *np = op->dev.of_node;
if (op->dev.of_match == NULL)
if (of_match_device(ppc4xx_edac_match, &op->dev) == NULL)
return -EINVAL;
/* Initial driver pointers and private data */