The lastclose callback in struct drm_driver is unused. Remove it. Also
update documentation.
v2:
- update to use drm_lastclose()
- fix typo in documentation
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Reviewed-by: Daniel Vetter <daniel.vet...@ffwll.ch>
---
drivers/gpu/drm/drm_file.c | 28 ++++++----------------------
drivers/gpu/drm/drm_internal.h | 1 -
include/drm/drm_drv.h | 28 ----------------------------
3 files changed, 6 insertions(+), 51 deletions(-)
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c
index 513bef816ae9..e8a841e70934 100644
--- a/drivers/gpu/drm/drm_file.c
+++ b/drivers/gpu/drm/drm_file.c
@@ -63,15 +63,6 @@ bool drm_dev_needs_global_mutex(struct drm_device *dev)
if (dev->driver->load || dev->driver->unload)
return true;
- /*
- * Drivers with the lastclose callback assume that it's synchronized
- * against concurrent opens, which again needs the BKL. The proper fix
- * is to use the drm_client infrastructure with proper locking for each
- * client.
- */
- if (dev->driver->lastclose)
- return true;
-
return false;
}
@@ -396,14 +387,8 @@ int drm_open(struct inode *inode, struct file *filp)
}
EXPORT_SYMBOL(drm_open);
-void drm_lastclose(struct drm_device * dev)
+static void drm_lastclose(struct drm_device *dev)
{
- drm_dbg_core(dev, "\n");
-
- if (dev->driver->lastclose)
- dev->driver->lastclose(dev);
- drm_dbg_core(dev, "driver lastclose completed\n");
-
drm_client_dev_restore(dev);
if (dev_is_pci(dev->dev))
@@ -416,9 +401,9 @@ void drm_lastclose(struct drm_device * dev)
* @filp: file pointer.
*
* This function must be used by drivers as their &file_operations.release
- * method. It frees any resources associated with the open file, and calls the
- * &drm_driver.postclose driver callback. If this is the last open file for the
- * DRM device also proceeds to call the &drm_driver.lastclose driver callback.
+ * method. It frees any resources associated with the open file. If this
+ * is the last open file for the DRM device, it also restores the active
+ * in-kernel DRM client.
*
* RETURNS:
*
@@ -488,9 +473,8 @@ void drm_file_update_pid(struct drm_file *filp)
*
* This function may be used by drivers as their &file_operations.release
* method. It frees any resources associated with the open file prior to taking
- * the drm_global_mutex, which then calls the &drm_driver.postclose driver
- * callback. If this is the last open file for the DRM device also proceeds to
- * call the &drm_driver.lastclose driver callback.
+ * the drm_global_mutex. If this is the last open file for the DRM device, it
+ * then restores the active in-kernel DRM client.
*
* RETURNS:
*
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 690505a1f7a5..23c99803af44 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -53,7 +53,6 @@ extern struct mutex drm_global_mutex;
bool drm_dev_needs_global_mutex(struct drm_device *dev);
struct drm_file *drm_file_alloc(struct drm_minor *minor);
void drm_file_free(struct drm_file *file);
-void drm_lastclose(struct drm_device *dev);
#ifdef CONFIG_PCI
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index cd37936c3926..02ea4e3248fd 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -228,34 +228,6 @@ struct drm_driver {
*/
void (*postclose) (struct drm_device *, struct drm_file *);
- /**
- * @lastclose:
- *
- * Called when the last &struct drm_file has been closed and there's
- * currently no userspace client for the &struct drm_device.
- *
- * Modern drivers should only use this to force-restore the fbdev
- * framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked().
- * Anything else would indicate there's something seriously wrong.
- * Modern drivers can also use this to execute delayed power switching
- * state changes, e.g. in conjunction with the :ref:`vga_switcheroo`
- * infrastructure.
- *
- * This is called after @postclose hook has been called.
- *
- * NOTE:
- *
- * All legacy drivers use this callback to de-initialize the hardware.
- * This is purely because of the shadow-attach model, where the DRM
- * kernel driver does not really own the hardware. Instead ownershipe is
- * handled with the help of userspace through an inheritedly racy dance
- * to set/unset the VT into raw mode.
- *
- * Legacy drivers initialize the hardware in the @firstopen callback,
- * which isn't even called for modern drivers.
- */
- void (*lastclose) (struct drm_device *);
-
/**
* @unload:
*
--
2.46.0
