diff options
Diffstat (limited to 'drivers/gpu/drm/drm_file.c')
| -rw-r--r-- | drivers/gpu/drm/drm_file.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index cf2463090d3a..246cf845e2c9 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -993,6 +993,40 @@ void drm_show_fdinfo(struct seq_file *m, struct file *f) EXPORT_SYMBOL(drm_show_fdinfo); /** + * drm_file_err - log process name, pid and client_name associated with a drm_file + * @file_priv: context of interest for process name and pid + * @fmt: printf() like format string + * + * Helper function for clients which needs to log process details such + * as name and pid etc along with user logs. + */ +void drm_file_err(struct drm_file *file_priv, const char *fmt, ...) +{ + va_list args; + struct va_format vaf; + struct pid *pid; + struct task_struct *task; + struct drm_device *dev = file_priv->minor->dev; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + + mutex_lock(&file_priv->client_name_lock); + rcu_read_lock(); + pid = rcu_dereference(file_priv->pid); + task = pid_task(pid, PIDTYPE_TGID); + + drm_err(dev, "comm: %s pid: %d client: %s ... %pV", task ? task->comm : "Unset", + task ? task->pid : 0, file_priv->client_name ?: "Unset", &vaf); + + va_end(args); + rcu_read_unlock(); + mutex_unlock(&file_priv->client_name_lock); +} +EXPORT_SYMBOL(drm_file_err); + +/** * mock_drm_getfile - Create a new struct file for the drm device * @minor: drm minor to wrap (e.g. #drm_device.primary) * @flags: file creation mode (O_RDWR etc) |