path: root/drivers/watchdog/mpc8xxx_wdt.c
diff options
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/watchdog/mpc8xxx_wdt.c
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 <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/watchdog/mpc8xxx_wdt.c')
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/watchdog/mpc8xxx_wdt.c b/drivers/watchdog/mpc8xxx_wdt.c
index 528bceb220f..eed5436ffb5 100644
--- a/drivers/watchdog/mpc8xxx_wdt.c
+++ b/drivers/watchdog/mpc8xxx_wdt.c
@@ -185,17 +185,20 @@ static struct miscdevice mpc8xxx_wdt_miscdev = {
.fops = &mpc8xxx_wdt_fops,
+static const struct of_device_id mpc8xxx_wdt_match[];
static int __devinit mpc8xxx_wdt_probe(struct platform_device *ofdev)
int ret;
+ const struct of_device_id *match;
struct device_node *np = ofdev->dev.of_node;
struct mpc8xxx_wdt_type *wdt_type;
u32 freq = fsl_get_sys_freq();
bool enabled;
- if (!ofdev->dev.of_match)
+ match = of_match_device(mpc8xxx_wdt_match, &ofdev->dev);
+ if (!match)
return -EINVAL;
- wdt_type = ofdev->dev.of_match->data;
+ wdt_type = match->data;
if (!freq || freq == -1)
return -EINVAL;