diff options
| author | David Dawes <dawes@xfree86.org> | 2002-01-27 20:05:42 +0000 |
|---|---|---|
| committer | David Dawes <dawes@xfree86.org> | 2002-01-27 20:05:42 +0000 |
| commit | 44aa4d6297874022a4f5a49ea24f2d052584d3dc (patch) | |
| tree | a3b8646dd51527d2fb246dbc11a124f4fd60968a /linux-core/drm_fops.c | |
| parent | 14945ada16218e9f918c24e0d702979fae9b07f6 (diff) | |
First pass merge of XFree86 4.2.0 import.
Diffstat (limited to 'linux-core/drm_fops.c')
| -rw-r--r-- | linux-core/drm_fops.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/linux-core/drm_fops.c b/linux-core/drm_fops.c index d8e9112f..9c2135fe 100644 --- a/linux-core/drm_fops.c +++ b/linux-core/drm_fops.c @@ -125,21 +125,31 @@ ssize_t DRM(read)(struct file *filp, char *buf, size_t count, loff_t *off) int avail; int send; int cur; + DECLARE_WAITQUEUE(wait, current); DRM_DEBUG("%p, %p\n", dev->buf_rp, dev->buf_wp); + add_wait_queue(&dev->buf_readers, &wait); + set_current_state(TASK_INTERRUPTIBLE); while (dev->buf_rp == dev->buf_wp) { DRM_DEBUG(" sleeping\n"); if (filp->f_flags & O_NONBLOCK) { + remove_wait_queue(&dev->buf_readers, &wait); + set_current_state(TASK_RUNNING); return -EAGAIN; } - interruptible_sleep_on(&dev->buf_readers); + schedule(); /* wait for dev->buf_readers */ if (signal_pending(current)) { DRM_DEBUG(" interrupted\n"); + remove_wait_queue(&dev->buf_readers, &wait); + set_current_state(TASK_RUNNING); return -ERESTARTSYS; } DRM_DEBUG(" awake\n"); + set_current_state(TASK_INTERRUPTIBLE); } + remove_wait_queue(&dev->buf_readers, &wait); + set_current_state(TASK_RUNNING); left = (dev->buf_rp + DRM_BSZ - dev->buf_wp) % DRM_BSZ; avail = DRM_BSZ - left; |