path: root/drivers/atm
diff options
authorGrant Likely <>2011-05-18 11:19:24 -0600
committerGrant Likely <>2011-05-18 12:32:23 -0600
commitb1608d69cb804e414d0887140ba08a9398e4e638 (patch)
tree8999cd827e7fb4138ff83f7829d8fdcf44ee653d /drivers/atm
parent01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 (diff)
drivercore: revert addition of of_match to struct device
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 <>
Diffstat (limited to 'drivers/atm')
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index bdd2719f3f68..bc9e702186dd 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -2643,16 +2643,19 @@ fore200e_init(struct fore200e* fore200e, struct device *parent)
+static const struct of_device_id fore200e_sba_match[];
static int __devinit fore200e_sba_probe(struct platform_device *op)
+ const struct of_device_id *match;
const struct fore200e_bus *bus;
struct fore200e *fore200e;
static int index = 0;
int err;
- if (!op->dev.of_match)
+ match = of_match_device(fore200e_sba_match, &op->dev);
+ if (!match)
return -EINVAL;
- bus = op->dev.of_match->data;
+ bus = match->data;
fore200e = kzalloc(sizeof(struct fore200e), GFP_KERNEL);
if (!fore200e)