linux-kernel - [PATCH 2/47] deprecate PHYSDEV* keys

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Date:	Mon, 25 Sep 2006 22:37:22 -0700
From:	Greg KH <greg@...ah.com>
To:	linux-kernel@...r.kernel.org
Cc:	Kay Sievers <kay.sievers@...e.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 2/47] deprecate PHYSDEV* keys

From: Kay Sievers <kay.sievers@...e.de>

deprecate PHYSDEV* values in the uevent environment

These values are no longer needed and inconsistent with the
stacking of class devices. The event environment should not
carry properties of a parent device. The key PHYSDEVDRIVER is
available as DRIVER, PHYDEVBUS is indentical SUBSYSTEM. Class
devices should not carry any of these values.

Signed-off-by: Kay Sievers <kay.sievers@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 Documentation/feature-removal-schedule.txt |   12 ++++++++++++
 drivers/base/class.c                       |    2 +-
 drivers/base/core.c                        |   10 +++++++---
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 552507f..a89a1b7 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -294,3 +294,15 @@ Why:	The frame diverter is included in m
 	It is not clear if anyone is still using it.
 Who:	Stephen Hemminger <shemminger@...l.org>
 
+---------------------------
+
+
+What:	PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
+When:	Oktober 2008
+Why:	The stacking of class devices makes these values misleading and
+	inconsistent.
+	Class devices should not carry any of these properties, and bus
+	devices have SUBSYTEM and DRIVER as a replacement.
+Who:	Kay Sievers <kay.sievers@...e.de>
+
+---------------------------
diff --git a/drivers/base/class.c b/drivers/base/class.c
index de89083..46336f1 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -361,7 +361,7 @@ static int class_uevent(struct kset *kse
 	pr_debug("%s - name = %s\n", __FUNCTION__, class_dev->class_id);
 
 	if (class_dev->dev) {
-		/* add physical device, backing this device  */
+		/* add device, backing this class device (deprecated) */
 		struct device *dev = class_dev->dev;
 		char *path = kobject_get_path(&dev->kobj, GFP_KERNEL);
 
diff --git a/drivers/base/core.c b/drivers/base/core.c
index be6b5bc..04d089f 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -149,17 +149,21 @@ static int dev_uevent(struct kset *kset,
 			       "MINOR=%u", MINOR(dev->devt));
 	}
 
-	/* add bus name of physical device */
+	/* add bus name (same as SUBSYSTEM, deprecated) */
 	if (dev->bus)
 		add_uevent_var(envp, num_envp, &i,
 			       buffer, buffer_size, &length,
 			       "PHYSDEVBUS=%s", dev->bus->name);
 
-	/* add driver name of physical device */
-	if (dev->driver)
+	/* add driver name (PHYSDEV* values are deprecated)*/
+	if (dev->driver) {
+		add_uevent_var(envp, num_envp, &i,
+			       buffer, buffer_size, &length,
+			       "DRIVER=%s", dev->driver->name);
 		add_uevent_var(envp, num_envp, &i,
 			       buffer, buffer_size, &length,
 			       "PHYSDEVDRIVER=%s", dev->driver->name);
+	}
 
 	/* terminate, set to next free slot, shrink available space */
 	envp[i] = NULL;
-- 
1.4.2.1

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