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platform/surface: aggregator_cdev: Add lockdep support

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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>
This commit is contained in:
Maximilian Luz 2021-06-04 15:47:54 +02:00 committed by Hans de Goede
parent e8e298a653
commit cbd224e0dd
1 changed files with 16 additions and 0 deletions
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16
drivers/platform/surface/surface_aggregator_cdev.c
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@ -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);