diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-07-30 11:28:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-30 12:34:39 +0200 |
| commit | fb583c8eeeb1fd57e24ef41ed94c9112067aeac9 (patch) | |
| tree | 987facf4a786b7cabd0da04fc948fd893c18697e /drivers/base | |
| parent | fs: kernfs: Fix possible null-pointer dereferences in kernfs_path_from_node_l... (diff) | |
| download | linux-fb583c8eeeb1fd57e24ef41ed94c9112067aeac9.tar.xz linux-fb583c8eeeb1fd57e24ef41ed94c9112067aeac9.zip | |
driver core: Fix creation of device links with PM-runtime flags
After commit 515db266a9da ("driver core: Remove device link creation
limitation"), if PM-runtime flags are passed to device_link_add(), it
will fail (returning NULL) due to an overly restrictive flags check
introduced by that commit.
Fix this issue by extending the check in question to cover the
PM-runtime flags too.
Fixes: 515db266a9da ("driver core: Remove device link creation limitation")
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/7674989.cD04D8YV3U@kreacher
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 21cd08162219..08eecab2497b 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -213,6 +213,9 @@ void device_pm_move_to_tail(struct device *dev) DL_FLAG_AUTOREMOVE_SUPPLIER | \ DL_FLAG_AUTOPROBE_CONSUMER) +#define DL_ADD_VALID_FLAGS (DL_MANAGED_LINK_FLAGS | DL_FLAG_STATELESS | \ + DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE) + /** * device_link_add - Create a link between two devices. * @consumer: Consumer end of the link. @@ -274,8 +277,7 @@ struct device_link *device_link_add(struct device *consumer, { struct device_link *link; - if (!consumer || !supplier || - (flags & ~(DL_FLAG_STATELESS | DL_MANAGED_LINK_FLAGS)) || + if (!consumer || !supplier || flags & ~DL_ADD_VALID_FLAGS || (flags & DL_FLAG_STATELESS && flags & DL_MANAGED_LINK_FLAGS) || (flags & DL_FLAG_AUTOPROBE_CONSUMER && flags & (DL_FLAG_AUTOREMOVE_CONSUMER | |