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Date:	Mon, 20 Oct 2014 17:33:41 +0200
From:	Wolfram Sang <>
Cc:	Greg KH <>,
	Julia Lawall <>,
	Wolfram Sang <>
Subject: [PATCH 1/4] core: platform: add warning if driver has no owner

Commit 9447057eaff8 ("platform_device: use a macro instead of
platform_driver_register") introduced a codepath which could result into
drivers having no owner. This went unnoticed for months, so add a
warning in case this happens again somewhere else somewhen.

Signed-off-by: Wolfram Sang <>
 drivers/base/driver.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 9e29943e56ca..6b10ff3bb410 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -151,6 +151,9 @@ int driver_register(struct device_driver *drv)
+	if (!drv->owner)
+		printk(KERN_WARNING "Driver '%s' needs an owner", drv->name);
 	if ((drv->bus->probe && drv->probe) ||
 	    (drv->bus->remove && drv->remove) ||
 	    (drv->bus->shutdown && drv->shutdown))

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