X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fbase%2Fsys.c;h=6fc23ab127bd52abd01f10eb55136a7c3057a12b;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=9102e3756f953cfc8bd0303f1add2948ee07a8bc;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 9102e3756..6fc23ab12 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -21,7 +21,10 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/pm.h>
+#include <linux/device.h>
+#include <asm/semaphore.h>
 
+#include "base.h"
 
 extern struct subsystem devices_subsys;
 
@@ -37,7 +40,7 @@ sysdev_show(struct kobject * kobj, struct attribute * attr, char * buffer)
 
 	if (sysdev_attr->show)
 		return sysdev_attr->show(sysdev, buffer);
-	return 0;
+	return -EIO;
 }
 
 
@@ -50,7 +53,7 @@ sysdev_store(struct kobject * kobj, struct attribute * attr,
 
 	if (sysdev_attr->store)
 		return sysdev_attr->store(sysdev, buffer, count);
-	return 0;
+	return -EIO;
 }
 
 static struct sysfs_ops sysfs_ops = {
@@ -289,6 +292,27 @@ void sysdev_shutdown(void)
 	up(&sysdev_drivers_lock);
 }
 
+static void __sysdev_resume(struct sys_device *dev)
+{
+	struct sysdev_class *cls = dev->cls;
+	struct sysdev_driver *drv;
+
+	/* First, call the class-specific one */
+	if (cls->resume)
+		cls->resume(dev);
+
+	/* Call auxillary drivers next. */
+	list_for_each_entry(drv, &cls->drivers, entry) {
+		if (drv->resume)
+			drv->resume(dev);
+	}
+
+	/* Call global drivers. */
+	list_for_each_entry(drv, &sysdev_drivers, entry) {
+		if (drv->resume)
+			drv->resume(dev);
+	}
+}
 
 /**
  *	sysdev_suspend - Suspend all system devices.
@@ -306,38 +330,93 @@ void sysdev_shutdown(void)
 int sysdev_suspend(pm_message_t state)
 {
 	struct sysdev_class * cls;
+	struct sys_device *sysdev, *err_dev;
+	struct sysdev_driver *drv, *err_drv;
+	int ret;
 
 	pr_debug("Suspending System Devices\n");
 
 	list_for_each_entry_reverse(cls, &system_subsys.kset.list,
 				    kset.kobj.entry) {
-		struct sys_device * sysdev;
 
 		pr_debug("Suspending type '%s':\n",
 			 kobject_name(&cls->kset.kobj));
 
 		list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
-			struct sysdev_driver * drv;
 			pr_debug(" %s\n", kobject_name(&sysdev->kobj));
 
 			/* Call global drivers first. */
 			list_for_each_entry(drv, &sysdev_drivers, entry) {
-				if (drv->suspend)
-					drv->suspend(sysdev, state);
+				if (drv->suspend) {
+					ret = drv->suspend(sysdev, state);
+					if (ret)
+						goto gbl_driver;
+				}
 			}
 
 			/* Call auxillary drivers next. */
 			list_for_each_entry(drv, &cls->drivers, entry) {
-				if (drv->suspend)
-					drv->suspend(sysdev, state);
+				if (drv->suspend) {
+					ret = drv->suspend(sysdev, state);
+					if (ret)
+						goto aux_driver;
+				}
 			}
 
 			/* Now call the generic one */
-			if (cls->suspend)
-				cls->suspend(sysdev, state);
+			if (cls->suspend) {
+				ret = cls->suspend(sysdev, state);
+				if (ret)
+					goto cls_driver;
+			}
 		}
 	}
 	return 0;
+	/* resume current sysdev */
+cls_driver:
+	drv = NULL;
+	printk(KERN_ERR "Class suspend failed for %s\n",
+		kobject_name(&sysdev->kobj));
+
+aux_driver:
+	if (drv)
+		printk(KERN_ERR "Class driver suspend failed for %s\n",
+				kobject_name(&sysdev->kobj));
+	list_for_each_entry(err_drv, &cls->drivers, entry) {
+		if (err_drv == drv)
+			break;
+		if (err_drv->resume)
+			err_drv->resume(sysdev);
+	}
+	drv = NULL;
+
+gbl_driver:
+	if (drv)
+		printk(KERN_ERR "sysdev driver suspend failed for %s\n",
+				kobject_name(&sysdev->kobj));
+	list_for_each_entry(err_drv, &sysdev_drivers, entry) {
+		if (err_drv == drv)
+			break;
+		if (err_drv->resume)
+			err_drv->resume(sysdev);
+	}
+	/* resume other sysdevs in current class */
+	list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
+		if (err_dev == sysdev)
+			break;
+		pr_debug(" %s\n", kobject_name(&err_dev->kobj));
+		__sysdev_resume(err_dev);
+	}
+
+	/* resume other classes */
+	list_for_each_entry_continue(cls, &system_subsys.kset.list,
+					kset.kobj.entry) {
+		list_for_each_entry(err_dev, &cls->kset.list, kobj.entry) {
+			pr_debug(" %s\n", kobject_name(&err_dev->kobj));
+			__sysdev_resume(err_dev);
+		}
+	}
+	return ret;
 }
 
 
@@ -363,25 +442,9 @@ int sysdev_resume(void)
 			 kobject_name(&cls->kset.kobj));
 
 		list_for_each_entry(sysdev, &cls->kset.list, kobj.entry) {
-			struct sysdev_driver * drv;
 			pr_debug(" %s\n", kobject_name(&sysdev->kobj));
 
-			/* First, call the class-specific one */
-			if (cls->resume)
-				cls->resume(sysdev);
-
-			/* Call auxillary drivers next. */
-			list_for_each_entry(drv, &cls->drivers, entry) {
-				if (drv->resume)
-					drv->resume(sysdev);
-			}
-
-			/* Call global drivers. */
-			list_for_each_entry(drv, &sysdev_drivers, entry) {
-				if (drv->resume)
-					drv->resume(sysdev);
-			}
-
+			__sysdev_resume(sysdev);
 		}
 	}
 	return 0;