fix for drm in /proc - from Jon Smirl

4 files changed, 33 insertions, 31 deletions

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index dfa56d90..7b136dfe 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -927,10 +927,10 @@ int                   DRM(stub_register)(const char *name,
 int                   DRM(stub_unregister)(int minor);
 
 				/* Proc support (drm_proc.h) */
-extern struct proc_dir_entry *DRM(proc_init)(drm_device_t *dev,
-					     int minor,
-					     struct proc_dir_entry *root,
-					     struct proc_dir_entry **dev_root);
+extern int 	      DRM(proc_init)(drm_device_t *dev,
+					int minor,
+					struct proc_dir_entry *root,
+					struct proc_dir_entry **dev_root);
 extern int            DRM(proc_cleanup)(int minor,
 					struct proc_dir_entry *root,
 					struct proc_dir_entry *dev_root);
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index a6e745f3..a75566e8 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -153,6 +153,7 @@ struct drm_stub_info {
 	int (*info_unregister)(int minor);
 	struct class_simple *drm_class;
 	int *info_count;
+	struct proc_dir_entry *proc_root;
 };
 extern struct drm_stub_info DRM(stub_info);
 
@@ -775,7 +776,7 @@ static void __exit drm_cleanup( drm_device_t *dev )
 	}
 #endif
 
-	class_simple_device_remove(MKDEV(DRM_MAJOR, 0));
+	class_simple_device_remove(MKDEV(DRM_MAJOR, dev->minor));
 }
 
 static void __exit drm_exit (void)
diff --git a/linux-core/drm_proc.c b/linux-core/drm_proc.c
index dc6e1bb2..a9affc5a 100644
--- a/linux-core/drm_proc.c
+++ b/linux-core/drm_proc.c
@@ -87,7 +87,7 @@ struct drm_proc_list {
  * "/proc/dri/%minor%/", and each entry in proc_list as
  * "/proc/dri/%minor%/%name%".
  */
-struct proc_dir_entry *DRM(proc_init)(drm_device_t *dev, int minor,
+int DRM(proc_init)(drm_device_t *dev, int minor,
 				      struct proc_dir_entry *root,
 				      struct proc_dir_entry **dev_root)
 {
@@ -95,17 +95,11 @@ struct proc_dir_entry *DRM(proc_init)(drm_device_t *dev, int minor,
 	int		      i, j;
 	char                  name[64];
 
-	if (!minor) root = create_proc_entry("dri", S_IFDIR, NULL);
-	if (!root) {
-		DRM_ERROR("Cannot create /proc/dri\n");
-		return NULL;
-	}
-
 	sprintf(name, "%d", minor);
 	*dev_root = create_proc_entry(name, S_IFDIR, root);
 	if (!*dev_root) {
 		DRM_ERROR("Cannot create /proc/dri/%s\n", name);
-		return NULL;
+		return -1;
 	}
 
 	for (i = 0; i < DRM_PROC_ENTRIES; i++) {
@@ -118,14 +112,12 @@ struct proc_dir_entry *DRM(proc_init)(drm_device_t *dev, int minor,
 				remove_proc_entry(DRM(proc_list)[i].name,
 						  *dev_root);
 			remove_proc_entry(name, root);
-			if (!minor) remove_proc_entry("dri", NULL);
-			return NULL;
+			return -1;
 		}
 		ent->read_proc = DRM(proc_list)[i].f;
 		ent->data      = dev;
 	}
-
-	return root;
+	return 0;
 }
 
 
@@ -151,7 +143,6 @@ int DRM(proc_cleanup)(int minor, struct proc_dir_entry *root,
 		remove_proc_entry(DRM(proc_list)[i].name, dev_root);
 	sprintf(name, "%d", minor);
 	remove_proc_entry(name, root);
-	if (!minor) remove_proc_entry("dri", NULL);
 
 	return 0;
 }
diff --git a/linux-core/drm_stub.c b/linux-core/drm_stub.c
index a1b45a92..d61f73ee 100644
--- a/linux-core/drm_stub.c
+++ b/linux-core/drm_stub.c
@@ -43,8 +43,6 @@ static struct drm_stub_list {
 	struct proc_dir_entry  *dev_root;	/**< proc directory entry */
 } *DRM(stub_list);
 
-static struct proc_dir_entry *DRM(stub_root);
-
 /**
  * File \c open operation.
  *
@@ -175,9 +173,8 @@ static int DRM(stub_getminor)(const char *name, struct file_operations *fops,
 		if (!DRM(stub_list)[i].fops) {
 			DRM(stub_list)[i].name = name;
 			DRM(stub_list)[i].fops = fops;
-			DRM(stub_root) = DRM(proc_init)(dev, i, DRM(stub_root),
-							&DRM(stub_list)[i]
-							.dev_root);
+			DRM(proc_init)(dev, i, DRM(stub_info).proc_root,
+							&DRM(stub_list)[i].dev_root);
 			(*DRM(stub_info).info_count)++;
 			DRM_DEBUG("info count increased %d\n", *DRM(stub_info).info_count);
 			return i;
@@ -201,13 +198,13 @@ static int DRM(stub_putminor)(int minor)
 	if (minor < 0 || minor >= DRM_STUB_MAXCARDS) return -1;
 	DRM(stub_list)[minor].name = NULL;
 	DRM(stub_list)[minor].fops = NULL;
-	DRM(proc_cleanup)(minor, DRM(stub_root),
+	DRM(proc_cleanup)(minor, DRM(stub_info).proc_root,
 			  DRM(stub_list)[minor].dev_root);
 
 	(*DRM(stub_info).info_count)--;
 
-	if ((*DRM(stub_info).info_count)!=0) {
-		if (DRM(numdevs)==0) {
+	if ((*DRM(stub_info).info_count) != 0) {
+		if (DRM(numdevs) == 0) {
 			DRM_DEBUG("inter_module_put called %d\n", *DRM(stub_info).info_count);
 			inter_module_put("drm");
 		}
@@ -217,6 +214,7 @@ static int DRM(stub_putminor)(int minor)
 		DRM(free)(DRM(stub_list),
 			  sizeof(*DRM(stub_list)) * DRM_STUB_MAXCARDS,
 			  DRM_MEM_STUB);
+		remove_proc_entry("dri", NULL);
 		class_simple_destroy(DRM(stub_info).drm_class);
 		unregister_chrdev(DRM_MAJOR, "drm");
 	}
@@ -269,27 +267,38 @@ int DRM(stub_register)(const char *name, struct file_operations *fops,
 			}
 
 			DRM(stub_info).drm_class = class_simple_create(THIS_MODULE, "drm");
-			class_simple_set_hotplug(DRM(stub_info).drm_class, drm_hotplug);
 			if (IS_ERR(DRM(stub_info).drm_class)) {
 				printk (KERN_ERR "Error creating drm class.\n");
 				unregister_chrdev(DRM_MAJOR, "drm");
 				return PTR_ERR(DRM(stub_info).drm_class);
 			}
+			class_simple_set_hotplug(DRM(stub_info).drm_class, drm_hotplug);
+
 			DRM_DEBUG("calling inter_module_register\n");
 			inter_module_register("drm", THIS_MODULE, &DRM(stub_info));
+			
+			DRM(stub_info).proc_root = create_proc_entry("dri", S_IFDIR, NULL);
+			if (!DRM(stub_info).proc_root) {
+				DRM_ERROR("Cannot create /proc/dri\n");
+				inter_module_unregister("drm");
+				unregister_chrdev(DRM_MAJOR, "drm");
+				class_simple_destroy(DRM(stub_info).drm_class);
+				return -1;
+			}
+		
 		}
-	}
-	else
+	} else
 		DRM_DEBUG("already retrieved inter_module information\n");
 
 	if (DRM(stub_info).info_register) {
 		ret2 = DRM(stub_info).info_register(name, fops, dev);
 		if (ret2 < 0) {
-			if (DRM(numdevs)==0 && !i) {
+			if (DRM(numdevs) == 0 && !i) {
 				inter_module_unregister("drm");
 				unregister_chrdev(DRM_MAJOR, "drm");
 				class_simple_destroy(DRM(stub_info).drm_class);
-				DRM_DEBUG("info_register failed deregistered everything\n");
+				remove_proc_entry("dri", NULL);
+				DRM_DEBUG("info_register failed, deregistered everything\n");
 			}
 			DRM_DEBUG("info_register failed\n");
 		}
@@ -321,4 +330,5 @@ struct drm_stub_info DRM(stub_info) = {
 	.info_unregister = DRM(stub_putminor),
 	.drm_class = NULL,
 	.info_count = &DRM(stub_count),
+	.proc_root = NULL,
 };