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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-12-10 19:32:49 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-23 11:23:44 -0800 |
| commit | e6309e7568d4b9d62298a887b10de42df11cb8c1 (patch) | |
| tree | e4c1fc9b2771eb95b9206668b2f1f7798088e1ab /drivers/base/core.c | |
| parent | 099c2f21d8cf0724b85abb2c589d6276953781b7 (diff) | |
| download | lwn-e6309e7568d4b9d62298a887b10de42df11cb8c1.tar.gz lwn-e6309e7568d4b9d62298a887b10de42df11cb8c1.zip | |
Driver-core: Fix bogus 0 error return in device_add()
If device_add() is called with a device which does not have dev->p set
up, then device_private_init() is called. If that succeeds, then the
error variable is set to 0. Now if the dev_name(dev) check further
down fails, then device_add() correctly terminates, but returns 0.
That of course lets the driver progress. If later another driver uses
this half set up device as parent then device_add() of the child
device explodes and renders sysfs completely unusable.
Set the error to -EINVAL if dev_name() check fails.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/core.c')
| -rw-r--r-- | drivers/base/core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 83afc8b8f27b..282025770429 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -909,8 +909,10 @@ int device_add(struct device *dev) dev->init_name = NULL; } - if (!dev_name(dev)) + if (!dev_name(dev)) { + error = -EINVAL; goto name_error; + } pr_debug("device: '%s': %s\n", dev_name(dev), __func__); |