linux-kernel - [PATCH v1] ESIA : Dummy eisa_driver_register should return error code

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Date:	Tue, 19 Jul 2016 00:15:01 +0530
From:	Arvind Yadav <arvind.yadav.cs@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Arvind Yadav <arvind.yadav.cs@...il.com>
Subject: [PATCH v1] ESIA : Dummy eisa_driver_register should return error code

The inline eisa_driver_register stub simply allows compilation on
systems with CONFIG_EISA disabled. the dummy eisa_driver_register
does not register an *_eisa_driver at all. The inline
eisa_driver_register should return to indicate lack of support
when attempting to register an *_eisa_driver on such a system with
CONFIG_EISA disabled.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 include/linux/eisa.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/eisa.h b/include/linux/eisa.h
index 6925249..cbfc684 100644
--- a/include/linux/eisa.h
+++ b/include/linux/eisa.h
@@ -70,7 +70,10 @@ void eisa_driver_unregister (struct eisa_driver *edrv);
 
 #else /* !CONFIG_EISA */
 
-static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
+static inline int eisa_driver_register(struct eisa_driver *edrv)
+{
+	return -ENODEV;
+}
 static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
 
 #endif /* !CONFIG_EISA */
-- 
1.9.1