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authorGrant Likely <grant.likely@secretlab.ca>2011-05-18 11:19:24 -0600
committerGrant Likely <grant.likely@secretlab.ca>2011-05-18 12:32:23 -0600
commitb1608d69cb804e414d0887140ba08a9398e4e638 (patch)
tree8999cd827e7fb4138ff83f7829d8fdcf44ee653d /drivers/net/can
parent01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 (diff)
downloadop-kernel-dev-b1608d69cb804e414d0887140ba08a9398e4e638.zip
op-kernel-dev-b1608d69cb804e414d0887140ba08a9398e4e638.tar.gz
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 <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/mscan/mpc5xxx_can.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
index bd1d811..5fedc33 100644
--- a/drivers/net/can/mscan/mpc5xxx_can.c
+++ b/drivers/net/can/mscan/mpc5xxx_can.c
@@ -247,8 +247,10 @@ static u32 __devinit mpc512x_can_get_clock(struct platform_device *ofdev,
}
#endif /* CONFIG_PPC_MPC512x */
+static struct of_device_id mpc5xxx_can_table[];
static int __devinit mpc5xxx_can_probe(struct platform_device *ofdev)
{
+ const struct of_device_id *match;
struct mpc5xxx_can_data *data;
struct device_node *np = ofdev->dev.of_node;
struct net_device *dev;
@@ -258,9 +260,10 @@ static int __devinit mpc5xxx_can_probe(struct platform_device *ofdev)
int irq, mscan_clksrc = 0;
int err = -ENOMEM;
- if (!ofdev->dev.of_match)
+ match = of_match_device(mpc5xxx_can_table, &ofdev->dev);
+ if (!match)
return -EINVAL;
- data = (struct mpc5xxx_can_data *)ofdev->dev.of_match->data;
+ data = match->data;
base = of_iomap(np, 0);
if (!base) {
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