4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yu Zhao <yuz...@google.com>
commit fb6de923ca3358a91525552b4907d4cb38730bdd upstream.
dev_set_drvdata() needs to be called before device_register()
exposes device to userspace. Otherwise kernel crashes after it
gets null pointer from dev_get_drvdata() when userspace tries
to access sysfs entries.
[Removed backtrace for length -- broonie]
Signed-off-by: Yu Zhao <yuz...@google.com>
Signed-off-by: Mark Brown <broo...@kernel.org>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/regulator/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4054,13 +4054,13 @@ regulator_register(const struct regulato
!rdev->desc->fixed_uV)
rdev->is_switch = true;
+ dev_set_drvdata(&rdev->dev, rdev);
ret = device_register(&rdev->dev);
if (ret != 0) {
put_device(&rdev->dev);
goto unset_supplies;
}
- dev_set_drvdata(&rdev->dev, rdev);
rdev_init_debugfs(rdev);
/* try to resolve regulators supply since a new one was registered */
