[PATCH 06/10] drm: Put legacy lastclose work into drm_legacy_dev_reinit

Daniel Vetter
2016-03-30T09:45:29Z

Except for the ->lasclose driver callback evrything in drm_lastclose()
is all legacy cruft and can be hidden. Which means another
dev->struct_mutex site disappears entirely for modern drivers!

Also while at it change the return value of drm_lastclose to void
since it will always succeed. No one checks the return value of
close() anyway, ever.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---
drivers/gpu/drm/drm_fops.c | 42 +++++++++++++++++++-----------------------
drivers/gpu/drm/drm_internal.h | 2 +-
include/drm/drm_agpsupport.h | 2 +-
3 files changed, 21 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 7b5a13cda7a6..c3d0aaac0669 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -381,14 +381,26 @@ static void drm_events_release(struct drm_file *file_priv)
*/
static void drm_legacy_dev_reinit(struct drm_device *dev)
{
- if (drm_core_check_feature(dev, DRIVER_MODESET))
- return;
+ if (dev->irq_enabled)
+ drm_irq_uninstall(dev);
+
+ mutex_lock(&dev->struct_mutex);
+
+ drm_legacy_agp_clear(dev);
+
+ drm_legacy_sg_cleanup(dev);
+ drm_legacy_vma_flush(dev);
+ drm_legacy_dma_takedown(dev);
+
+ mutex_unlock(&dev->struct_mutex);

dev->sigdata.lock = NULL;

dev->context_flag = 0;
dev->last_context = 0;
dev->if_version = 0;
+
+ DRM_DEBUG("lastclose completed\n");
}

/*
@@ -400,7 +412,7 @@ static void drm_legacy_dev_reinit(struct drm_device *dev)
*
* \sa drm_device
*/
-int drm_lastclose(struct drm_device * dev)
+void drm_lastclose(struct drm_device * dev)
{
DRM_DEBUG("\n");

@@ -408,23 +420,8 @@ int drm_lastclose(struct drm_device * dev)
dev->driver->lastclose(dev);
DRM_DEBUG("driver lastclose completed\n");

- if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
- drm_irq_uninstall(dev);
-
- mutex_lock(&dev->struct_mutex);
-
- drm_legacy_agp_clear(dev);
-
- drm_legacy_sg_cleanup(dev);
- drm_legacy_vma_flush(dev);
- drm_legacy_dma_takedown(dev);
-
- mutex_unlock(&dev->struct_mutex);
-
- drm_legacy_dev_reinit(dev);
-
- DRM_DEBUG("lastclose completed\n");
- return 0;
+ if (!drm_core_check_feature(dev, DRIVER_MODESET))
+ drm_legacy_dev_reinit(dev);
}

/**
@@ -445,7 +442,6 @@ int drm_release(struct inode *inode, struct file *filp)
struct drm_file *file_priv = filp->private_data;
struct drm_minor *minor = file_priv->minor;
struct drm_device *dev = minor->dev;
- int retcode = 0;

mutex_lock(&drm_global_mutex);

@@ -538,7 +534,7 @@ int drm_release(struct inode *inode, struct file *filp)
*/

if (!--dev->open_count) {
- retcode = drm_lastclose(dev);
+ drm_lastclose(dev);
if (drm_device_is_unplugged(dev))
drm_put_dev(dev);
}
@@ -546,7 +542,7 @@ int drm_release(struct inode *inode, struct file *filp)

drm_minor_release(minor);

- return retcode;
+ return 0;
}
EXPORT_SYMBOL(drm_release);

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 43cbda3306ac..c81ff4769e7b 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -26,7 +26,7 @@ extern unsigned int drm_timestamp_monotonic;

/* drm_fops.c */
extern struct mutex drm_global_mutex;
-int drm_lastclose(struct drm_device *dev);
+void drm_lastclose(struct drm_device *dev);

/* drm_pci.c */
int drm_pci_set_unique(struct drm_device *dev,
diff --git a/include/drm/drm_agpsupport.h b/include/drm/drm_agpsupport.h
index e134e9ca422b..b2d912670a7f 100644
--- a/include/drm/drm_agpsupport.h
+++ b/include/drm/drm_agpsupport.h
@@ -93,7 +93,7 @@ static inline struct drm_agp_head *drm_agp_init(struct drm_device *dev)
return NULL;
}

-static inline void drm_agp_clear(struct drm_device *dev)
+static inline void drm_legacy_agp_clear(struct drm_device *dev)
{
}

--
2.8.0.rc3