[Intel-gfx] [RFC v4 20/25] drm/prime: Don't pin module on export for in-kernel clients

[Noralf Trønnes]

Avoid pinning the module when exporting a GEM object as a dmabuf. This
makes it possible to unload drivers that has in-kernel clients using it.
The client is removed on drm_dev_unregister() so no need to pin the driver.

Signed-off-by: Noralf Trønnes 
---
 drivers/gpu/drm/drm_prime.c | 24 
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index e6052ab2bec4..f9dbe3b9db20 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -567,6 +567,30 @@ struct dma_buf *drm_gem_prime_export(struct drm_device 
*dev,
.flags = flags,
.priv = obj,
};
+   bool is_internal = false;
+   struct drm_file *file;
+
+   mutex_lock(>filelist_mutex);
+   list_for_each_entry(file, >filelist_internal, lhead) {
+   struct drm_gem_object *iter;
+   int id;
+
+   spin_lock(>table_lock);
+   idr_for_each_entry(>object_idr, iter, id) {
+   if (iter == obj) {
+   is_internal = true;
+   break;
+   }
+   }
+   spin_unlock(>table_lock);
+
+   if (is_internal)
+   break;
+   }
+   mutex_unlock(>filelist_mutex);
+
+   if (is_internal)
+   exp_info.owner = NULL;
 
if (dev->driver->gem_prime_res_obj)
exp_info.resv = dev->driver->gem_prime_res_obj(obj);
-- 
2.15.1

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[Intel-gfx] [RFC v4 20/25] drm/prime: Don't pin module on export for in-kernel clients

[Noralf Trønnes]

Avoid pinning the module when exporting a GEM object as a dmabuf. This
makes it possible to unload drivers that has in-kernel clients using it.
The client is removed on drm_dev_unregister() so no need to pin the driver.

Signed-off-by: Noralf Trønnes 
---
 drivers/gpu/drm/drm_prime.c | 24 
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index e6052ab2bec4..f9dbe3b9db20 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -567,6 +567,30 @@ struct dma_buf *drm_gem_prime_export(struct drm_device 
*dev,
.flags = flags,
.priv = obj,
};
+   bool is_internal = false;
+   struct drm_file *file;
+
+   mutex_lock(>filelist_mutex);
+   list_for_each_entry(file, >filelist_internal, lhead) {
+   struct drm_gem_object *iter;
+   int id;
+
+   spin_lock(>table_lock);
+   idr_for_each_entry(>object_idr, iter, id) {
+   if (iter == obj) {
+   is_internal = true;
+   break;
+   }
+   }
+   spin_unlock(>table_lock);
+
+   if (is_internal)
+   break;
+   }
+   mutex_unlock(>filelist_mutex);
+
+   if (is_internal)
+   exp_info.owner = NULL;
 
if (dev->driver->gem_prime_res_obj)
exp_info.resv = dev->driver->gem_prime_res_obj(obj);
-- 
2.15.1

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[Intel-gfx] [RFC v4 20/25] drm/prime: Don't pin module on export for in-kernel clients

[Noralf Trønnes]

Avoid pinning the module when exporting a GEM object as a dmabuf. This
makes it possible to unload drivers that has in-kernel clients using it.
The client is removed on drm_dev_unregister() so no need to pin the driver.

Signed-off-by: Noralf Trønnes 
---
 drivers/gpu/drm/drm_prime.c | 24 
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index e6052ab2bec4..f9dbe3b9db20 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -567,6 +567,30 @@ struct dma_buf *drm_gem_prime_export(struct drm_device 
*dev,
.flags = flags,
.priv = obj,
};
+   bool is_internal = false;
+   struct drm_file *file;
+
+   mutex_lock(>filelist_mutex);
+   list_for_each_entry(file, >filelist_internal, lhead) {
+   struct drm_gem_object *iter;
+   int id;
+
+   spin_lock(>table_lock);
+   idr_for_each_entry(>object_idr, iter, id) {
+   if (iter == obj) {
+   is_internal = true;
+   break;
+   }
+   }
+   spin_unlock(>table_lock);
+
+   if (is_internal)
+   break;
+   }
+   mutex_unlock(>filelist_mutex);
+
+   if (is_internal)
+   exp_info.owner = NULL;
 
if (dev->driver->gem_prime_res_obj)
exp_info.resv = dev->driver->gem_prime_res_obj(obj);
-- 
2.15.1

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