Lets order things correctly:
->load()
->fistopen()
->open()
->close()
->lastclose()
->unload()
This doesn't change much as only savage and radeon use ->firstopen() and
they just do map-initialization. Therefore, the global drm mutex makes
sure there cannot be any other f_op between ->open() and ->firstopen().
However, once we get rid of that lock, we really want ->firstopen() to
initialize the device before ->open() is called.
Furthermore, this fixes the clean-up path in drm_open(). We currently
don't cleanup the drm_file object if ->firstopen() fails.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
drivers/gpu/drm/drm_fops.c | 139 +++++++++++++++++++++------------------------
include/drm/drmP.h | 2 +-
2 files changed, 66 insertions(+), 75 deletions(-)
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 021fe5d..8e73519 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -45,7 +45,7 @@ EXPORT_SYMBOL(drm_global_mutex);
static int drm_open_helper(struct file *filp, struct drm_minor *minor);
-static int drm_setup(struct drm_device * dev)
+static int drm_firstopen(struct drm_device * dev)
{
int ret;
@@ -66,6 +66,57 @@ static int drm_setup(struct drm_device * dev)
}
/**
+ * drm_legacy_dev_reinit
+ *
+ * Reinitializes a legacy/ums drm device in it's lastclose function.
+ */
+static void drm_legacy_dev_reinit(struct drm_device *dev)
+{
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return;
+
+ dev->sigdata.lock = NULL;
+
+ dev->context_flag = 0;
+ dev->last_context = 0;
+ dev->if_version = 0;
+}
+
+void drm_lastclose(struct drm_device * dev)
+{
+ struct drm_vma_entry *vma, *vma_temp;
+
+ DRM_DEBUG("\n");
+
+ if (dev->driver->lastclose)
+ 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_agp_clear(dev);
+
+ drm_legacy_sg_cleanup(dev);
+
+ /* Clear vma list (only built for debugging) */
+ list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
+ list_del(&vma->head);
+ kfree(vma);
+ }
+
+ drm_legacy_dma_takedown(dev);
+
+ mutex_unlock(&dev->struct_mutex);
+
+ drm_legacy_dev_reinit(dev);
+
+ DRM_DEBUG("lastclose completed\n");
+}
+
+/**
* Open file.
*
* \param inode device inode
@@ -81,31 +132,33 @@ int drm_open(struct inode *inode, struct file *filp)
struct drm_device *dev;
struct drm_minor *minor;
int retcode;
- int need_setup = 0;
minor = drm_minor_acquire(iminor(inode));
if (IS_ERR(minor))
return PTR_ERR(minor);
dev = minor->dev;
- if (!dev->open_count++)
- need_setup = 1;
/* share address_space across all char-devs of a single device */
filp->f_mapping = dev->anon_inode->i_mapping;
+ if (!dev->open_count) {
+ retcode = drm_firstopen(dev);
+ if (retcode)
+ goto err_minor;
+ }
+ ++dev->open_count;
+
retcode = drm_open_helper(filp, minor);
if (retcode)
goto err_undo;
- if (need_setup) {
- retcode = drm_setup(dev);
- if (retcode)
- goto err_undo;
- }
+
return 0;
err_undo:
- dev->open_count--;
+ if (!--dev->open_count)
+ drm_lastclose(dev);
+err_minor:
drm_minor_release(minor);
return retcode;
}
@@ -346,67 +399,6 @@ static void drm_events_release(struct drm_file *file_priv)
}
/**
- * drm_legacy_dev_reinit
- *
- * Reinitializes a legacy/ums drm device in it's lastclose function.
- */
-static void drm_legacy_dev_reinit(struct drm_device *dev)
-{
- if (drm_core_check_feature(dev, DRIVER_MODESET))
- return;
-
- dev->sigdata.lock = NULL;
-
- dev->context_flag = 0;
- dev->last_context = 0;
- dev->if_version = 0;
-}
-
-/**
- * Take down the DRM device.
- *
- * \param dev DRM device structure.
- *
- * Frees every resource in \p dev.
- *
- * \sa drm_device
- */
-int drm_lastclose(struct drm_device * dev)
-{
- struct drm_vma_entry *vma, *vma_temp;
-
- DRM_DEBUG("\n");
-
- if (dev->driver->lastclose)
- 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_agp_clear(dev);
-
- drm_legacy_sg_cleanup(dev);
-
- /* Clear vma list (only built for debugging) */
- list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
- list_del(&vma->head);
- kfree(vma);
- }
-
- drm_legacy_dma_takedown(dev);
-
- mutex_unlock(&dev->struct_mutex);
-
- drm_legacy_dev_reinit(dev);
-
- DRM_DEBUG("lastclose completed\n");
- return 0;
-}
-
-/**
* Release file.
*
* \param inode device inode
@@ -423,7 +415,6 @@ 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);
@@ -541,7 +532,7 @@ 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);
}
@@ -549,7 +540,7 @@ int drm_release(struct inode *inode, struct file *filp)
drm_minor_release(minor);
- return retcode;
+ return 0;
}
EXPORT_SYMBOL(drm_release);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index d3d9be6..d1730c5 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1181,7 +1181,7 @@ extern long drm_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
extern long drm_compat_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
-extern int drm_lastclose(struct drm_device *dev);
+extern void drm_lastclose(struct drm_device *dev);
extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
/* Device support (drm_fops.h) */
--
2.0.2
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