search for: ioctls_rwsem

.../drm_drv.c b/drivers/gpu/drm/drm_drv.c index 6116e3b..c54e9f8 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -464,6 +464,9 @@ long drm_ioctl(struct file *filp, } else memset(kdata, 0, usize); + if (dev->driver->ioctls_need_rwsem) + down_read(&dev->ioctls_rwsem); + if (ioctl->flags & DRM_UNLOCKED) retcode = func(dev, kdata, file_priv); else { @@ -472,6 +475,9 @@ long drm_ioctl(struct file *filp, mutex_unlock(&drm_global_mutex); } + if (dev->driver->ioctls_need_rwsem) + up_read(&dev->ioctls_rwsem); + if (cmd...

...file *filp, + unsigned int cmd, unsigned long arg) +{ + struct drm_file *file_priv = filp->private_data; + struct drm_device *dev = file_priv->minor->dev; + struct drm_nouveau_private *dev_priv = dev->dev_private; + + long ret = intr_rwsem_down_read_interruptible(&dev_priv->ioctls_rwsem); + if (ret) + return ret; + + ret = drm_ioctl(filp, cmd, arg); + + intr_rwsem_up_read(&dev_priv->ioctls_rwsem); + + return ret; +} + static const struct file_operations nouveau_driver_fops = { .owner = THIS_MODULE, .open = drm_open, .release = drm_release, - .unlocked_ioctl = drm_io...

...ouveau_drv.h" + +static bool off(struct drm_device *dev) +{ + struct pci_dev *pdev = dev->pdev; + struct drm_nouveau_private *dev_priv = dev->dev_private; + + pm_message_t pmm = { .event = PM_EVENT_SUSPEND }; + atomic_inc(&dev_priv->gpureset_in_progress); + down_write(&dev->ioctls_rwsem); + + dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; + if (nouveau_pci_suspend(pdev, pmm)) + goto fail; + + dev->switch_power_state = DRM_SWITCH_POWER_OFF; + return true; + +fail: + dev->switch_power_state = DRM_SWITCH_POWER_ON; + up_write(&dev->ioctls_rwsem); + return false;...