diff options
Diffstat (limited to 'drivers/char/drm/drm_lock.c')
| -rw-r--r-- | drivers/char/drm/drm_lock.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/char/drm/drm_lock.c b/drivers/char/drm/drm_lock.c index b276ae8a6633..f970dc36c18f 100644 --- a/drivers/char/drm/drm_lock.c +++ b/drivers/char/drm/drm_lock.c @@ -104,6 +104,9 @@ int drm_lock(struct inode *inode, struct file *filp, __set_current_state(TASK_RUNNING); remove_wait_queue(&dev->lock.lock_queue, &entry); + DRM_DEBUG( "%d %s\n", lock.context, ret ? "interrupted" : "has lock" ); + if (ret) return ret; + sigemptyset(&dev->sigmask); sigaddset(&dev->sigmask, SIGSTOP); sigaddset(&dev->sigmask, SIGTSTP); @@ -116,21 +119,20 @@ int drm_lock(struct inode *inode, struct file *filp, if (dev->driver->dma_ready && (lock.flags & _DRM_LOCK_READY)) dev->driver->dma_ready(dev); - if (dev->driver->dma_quiescent && (lock.flags & _DRM_LOCK_QUIESCENT)) - return dev->driver->dma_quiescent(dev); - - /* dev->driver->kernel_context_switch isn't used by any of the x86 - * drivers but is used by the Sparc driver. - */ + if (dev->driver->dma_quiescent && (lock.flags & _DRM_LOCK_QUIESCENT)) { + if (dev->driver->dma_quiescent(dev)) { + DRM_DEBUG( "%d waiting for DMA quiescent\n", lock.context); + return DRM_ERR(EBUSY); + } + } if (dev->driver->kernel_context_switch && dev->last_context != lock.context) { dev->driver->kernel_context_switch(dev, dev->last_context, lock.context); } - DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock"); - return ret; + return 0; } /** |