[PATCH 2/3] drivers/class: Add Legacy PM OPS usage check and warning to __class_register()

From: Shuah Khan
Date: Thu Nov 07 2013 - 19:11:45 EST


Add Legacy PM OPS usage checks to __class_register() function. If Legacy PM OPS
usage is found, print warning message to indicate the driver code needs
updating to use Dev PM OPS interfaces. This will help serve as a way to track
drivers that still use Legacy PM OPS and fix them.

The Legacy PM OPS check looks for suspend(struct device *, pm_message_t) or
resume(struct device *) class level interfaces.

Signed-off-by: Shuah Khan <shuah.kh@xxxxxxxxxxx>
---
drivers/base/class.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 8b7818b..f26a3f2 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -180,6 +180,10 @@ int __class_register(struct class *cls, struct lock_class_key *key)

pr_debug("device class '%s': registering\n", cls->name);

+ if (cls->suspend || cls->resume)
+ pr_warn("device class '%s': Please update to use dev pm ops\n",
+ cls->name);
+
cp = kzalloc(sizeof(*cp), GFP_KERNEL);
if (!cp)
return -ENOMEM;
--
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/