From 0bff0d9eb6317ccccafc79cac7b235b4cb4c9161 Mon Sep 17 00:00:00 2001
From: Jon Smirl <jonsmirl@yahoo.com>
Date: Tue, 28 Sep 2004 22:25:06 +0000
Subject: Getting the AGP module is a global resource. Make sure a dual PCI/AGP
     driver doesn't release it on unload since an AGP driver may also be    
 loaded.

---
 linux-core/drmP.h           |  9 +++++----
 linux-core/drm_agpsupport.c | 19 ++-----------------
 linux-core/drm_drv.c        |  6 ++++--
 3 files changed, 11 insertions(+), 23 deletions(-)

(limited to 'linux-core')

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 3bd11aaa..b1b23b58 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -246,9 +246,10 @@
 #define LOCK_TEST_WITH_RETURN( dev, filp )				\
 do {									\
 	if ( !_DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ) ||		\
-	     dev->lock.filp != filp ) {				\
-		DRM_ERROR( "%s called without lock held\n",		\
-			   __FUNCTION__ );				\
+	     dev->lock.filp != filp ) 	{				\
+		DRM_ERROR( "%s called without lock held, held  %d owner %p %p\n",\
+			   __FUNCTION__, _DRM_LOCK_IS_HELD( dev->lock.hw_lock->lock ),\
+			   dev->lock.filp, filp );			\
 		return -EINVAL;						\
 	}								\
 } while (0)
@@ -907,8 +908,8 @@ extern void          drm_vbl_send_signals( drm_device_t *dev );
 
 
 				/* AGP/GART support (drm_agpsupport.h) */
+extern const drm_agp_t *drm_agp;
 extern drm_agp_head_t *drm_agp_init(void);
-extern void           drm_agp_uninit(void);
 extern int            drm_agp_acquire(struct inode *inode, struct file *filp,
 				       unsigned int cmd, unsigned long arg);
 extern void           drm_agp_do_release(void);
diff --git a/linux-core/drm_agpsupport.c b/linux-core/drm_agpsupport.c
index 8165c835..bdb57a97 100644
--- a/linux-core/drm_agpsupport.c
+++ b/linux-core/drm_agpsupport.c
@@ -36,13 +36,10 @@
 
 #if __OS_HAS_AGP
 
-#define DRM_AGP_GET (drm_agp_t *)inter_module_get("drm_agp")
-#define DRM_AGP_PUT inter_module_put("drm_agp")
-
 /**
  * Pointer to the drm_agp_t structure made available by the agpgart module.
  */
-static const drm_agp_t *drm_agp = NULL;
+const drm_agp_t *drm_agp = NULL;
 
 /**
  * AGP information ioctl.
@@ -401,9 +398,8 @@ int drm_agp_free(struct inode *inode, struct file *filp,
  */
 drm_agp_head_t *drm_agp_init(void)
 {
-	drm_agp_head_t *head         = NULL;
+	drm_agp_head_t *head = NULL;
 
-	drm_agp = DRM_AGP_GET;
 	if (drm_agp) {
 		if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
 			return NULL;
@@ -425,17 +421,6 @@ drm_agp_head_t *drm_agp_init(void)
 	return head;
 }
 
-/**
- * Free the AGP resources.
- *
- * Releases the pointer in ::drm_agp.
- */
-void drm_agp_uninit(void)
-{
-	DRM_AGP_PUT;
-	drm_agp = NULL;
-}
-
 /** Calls drm_agp->allocate_memory() */
 DRM_AGP_MEM *drm_agp_allocate_memory(size_t pages, u32 type)
 {
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 425320b1..669b1a25 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -608,7 +608,6 @@ static void __exit drm_cleanup( drm_device_t *dev )
 	}
 
 	if (drm_core_has_AGP(dev) && dev->agp ) {
-		drm_agp_uninit();
 		drm_free( dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS );
 		dev->agp = NULL;
 	}
@@ -670,7 +669,7 @@ static int __init drm_core_init(void)
 		ret = -1;
 		goto err_p3;
 	}
-	DRM_DEBUG("calling inter_module_register\n");
+	drm_agp = (drm_agp_t *)inter_module_get("drm_agp");
 		
 	DRM_INFO( "Initialized %s %d.%d.%d %s\n",
 		DRIVER_NAME,
@@ -691,6 +690,9 @@ err_p1:
 
 static void __exit drm_core_exit (void)
 {
+	if (drm_agp)
+		inter_module_put("drm_agp");
+
 	remove_proc_entry("dri", NULL);
 	drm_sysfs_destroy(drm_class);
 
-- 
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