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authorWim Van Sebroeck <wim@iguana.be>2012-06-26 18:07:21 (GMT)
committerWim Van Sebroeck <wim@iguana.be>2012-06-28 18:40:56 (GMT)
commit8b9468d496abd357cc797b27a79d4402f5e0e94d (patch)
tree31e7d3ebbaf94183dc442cbc1628831d2b5cdc40
parenta089361cf5f1d6a5295aa5385238bd044998e1e9 (diff)
watchdog: core: fix WDIOC_GETSTATUS return value
In commit 7a87982420e5e126bfefeb42232d1fd92052794e we added a wrapper for the WDIOC_GETSTATUS ioctl call. The code results however in a different behaviour: it returns an error if the driver doesn't support the status operation. This is not according to the API that says that when we don't support the status operation, that we just should return a 0 value. Only when the device isn't there anymore, we should return an error. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
-rw-r--r--drivers/watchdog/watchdog_dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
index 672d169..ef8edec 100644
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -349,7 +349,7 @@ static long watchdog_ioctl(struct file *file, unsigned int cmd,
sizeof(struct watchdog_info)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
err = watchdog_get_status(wdd, &val);
- if (err)
+ if (err == -ENODEV)
return err;
return put_user(val, p);
case WDIOC_GETBOOTSTATUS:

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