diff options
Diffstat (limited to 'linux-core')
| -rw-r--r-- | linux-core/drmP.h | 4 | ||||
| -rw-r--r-- | linux-core/drm_drv.c | 28 |
2 files changed, 31 insertions, 1 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h index 37b93525..a3f9ca86 100644 --- a/linux-core/drmP.h +++ b/linux-core/drmP.h @@ -1129,7 +1129,9 @@ extern struct drm_sysfs_class *drm_class; extern struct proc_dir_entry *drm_proc_root; extern drm_local_map_t *drm_getsarea(struct drm_device *dev); - +extern 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); /* Proc support (drm_proc.h) */ extern int drm_proc_init(drm_device_t * dev, int minor, 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; |