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| author | Maximilian Luz <luzmaximilian@gmail.com> | 2021-06-04 16:47:54 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-06-16 18:47:53 +0300 |
| commit | cbd224e0ddfe59eb1eb92e436825f3eca4de3c10 (patch) | |
| tree | c66dc7e9ef46d31ac5cfcc1ffdc332046bf5479c /drivers/platform/surface | |
| parent | e8e298a653856b1f3a2bb7b1fe31d3faa93cc7dc (diff) | |
| download | linux-cbd224e0ddfe59eb1eb92e436825f3eca4de3c10.tar.xz | |
platform/surface: aggregator_cdev: Add lockdep support
Mark functions with locking requirements via the corresponding lockdep
calls for debugging and documentary purposes.
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210604134755.535590-7-luzmaximilian@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/surface')
| -rw-r--r-- | drivers/platform/surface/surface_aggregator_cdev.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/platform/surface/surface_aggregator_cdev.c b/drivers/platform/surface/surface_aggregator_cdev.c index 7b86b36eaaa0..30fb50fde450 100644 --- a/drivers/platform/surface/surface_aggregator_cdev.c +++ b/drivers/platform/surface/surface_aggregator_cdev.c @@ -139,6 +139,8 @@ static int ssam_cdev_notifier_register(struct ssam_cdev_client *client, u8 tc, i struct ssam_cdev_notifier *nf; int status; + lockdep_assert_held_read(&client->cdev->lock); + /* Validate notifier target category. */ if (!ssh_rqid_is_event(rqid)) return -EINVAL; @@ -188,6 +190,8 @@ static int ssam_cdev_notifier_unregister(struct ssam_cdev_client *client, u8 tc) const u16 event = ssh_rqid_to_event(rqid); int status; + lockdep_assert_held_read(&client->cdev->lock); + /* Validate notifier target category. */ if (!ssh_rqid_is_event(rqid)) return -EINVAL; @@ -257,6 +261,8 @@ static long ssam_cdev_request(struct ssam_cdev_client *client, struct ssam_cdev_ void __user *rspdata; int status = 0, ret = 0, tmp; + lockdep_assert_held_read(&client->cdev->lock); + ret = copy_struct_from_user(&rqst, sizeof(rqst), r, sizeof(*r)); if (ret) goto out; @@ -367,6 +373,8 @@ static long ssam_cdev_notif_register(struct ssam_cdev_client *client, struct ssam_cdev_notifier_desc desc; long ret; + lockdep_assert_held_read(&client->cdev->lock); + ret = copy_struct_from_user(&desc, sizeof(desc), d, sizeof(*d)); if (ret) return ret; @@ -380,6 +388,8 @@ static long ssam_cdev_notif_unregister(struct ssam_cdev_client *client, struct ssam_cdev_notifier_desc desc; long ret; + lockdep_assert_held_read(&client->cdev->lock); + ret = copy_struct_from_user(&desc, sizeof(desc), d, sizeof(*d)); if (ret) return ret; @@ -395,6 +405,8 @@ static long ssam_cdev_event_enable(struct ssam_cdev_client *client, struct ssam_event_id id; long ret; + lockdep_assert_held_read(&client->cdev->lock); + /* Read descriptor from user-space. */ ret = copy_struct_from_user(&desc, sizeof(desc), d, sizeof(*d)); if (ret) @@ -421,6 +433,8 @@ static long ssam_cdev_event_disable(struct ssam_cdev_client *client, struct ssam_event_id id; long ret; + lockdep_assert_held_read(&client->cdev->lock); + /* Read descriptor from user-space. */ ret = copy_struct_from_user(&desc, sizeof(desc), d, sizeof(*d)); if (ret) @@ -513,6 +527,8 @@ static int ssam_cdev_device_release(struct inode *inode, struct file *filp) static long __ssam_cdev_device_ioctl(struct ssam_cdev_client *client, unsigned int cmd, unsigned long arg) { + lockdep_assert_held_read(&client->cdev->lock); + switch (cmd) { case SSAM_CDEV_REQUEST: return ssam_cdev_request(client, (struct ssam_cdev_request __user *)arg); |