diff options
Diffstat (limited to 'linux-core/drm_drv.c')
| -rw-r--r-- | linux-core/drm_drv.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c index 3dc4d53c..e5788d76 100644 --- a/linux-core/drm_drv.c +++ b/linux-core/drm_drv.c @@ -623,6 +623,34 @@ err_i1: } EXPORT_SYMBOL(drm_ioctl); +int drm_wait_on(drm_device_t *dev, wait_queue_head_t *queue, int timeout, + int (*fn)(drm_device_t *dev, void *priv), void *priv) +{ + DECLARE_WAITQUEUE(entry, current); + unsigned long end = jiffies + (timeout); + int ret = 0; + add_wait_queue(queue, &entry); + + for (;;) { + __set_current_state(TASK_INTERRUPTIBLE); + if ((*fn)(dev, priv)) + break; + if (time_after_eq(jiffies, end)) { + ret = -EBUSY; + break; + } + schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); + if (signal_pending(current)) { + ret = -EINTR; + break; + } + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(queue, &entry); + return ret; +} +EXPORT_SYMBOL(drm_wait_on); + drm_local_map_t *drm_getsarea(struct drm_device *dev) { drm_map_list_t *entry; |