linux-kernel - [PATCH 10/14] pps: return proper error values from attach

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Message-Id: <1428492040-5581-11-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Wed,  8 Apr 2015 16:50:36 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jean Delvare <jdelvare@...e.de>,
	Wolfram Sang <wsa@...-dreams.de>,
	Rodolfo Giometti <giometti@...eenne.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	Mark Brown <broonie@...nel.org>,
	Willy Tarreau <willy@...a-x.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>
Cc:	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	netdev@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-spi@...r.kernel.org, devel@...verdev.osuosl.org,
	alsa-devel@...a-project.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 10/14] pps: return proper error values from attach

now that we are monitoring the return value from attach, make the
required changes to return proper value from its attach function.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 drivers/pps/clients/pps_parport.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/pps/clients/pps_parport.c b/drivers/pps/clients/pps_parport.c
index 38a8bbe..a411621 100644
--- a/drivers/pps/clients/pps_parport.c
+++ b/drivers/pps/clients/pps_parport.c
@@ -134,7 +134,7 @@ out_both:
 	return;
 }
 
-static void parport_attach(struct parport *port)
+static int parport_attach(struct parport *port)
 {
 	struct pps_client_pp *device;
 	struct pps_source_info info = {
@@ -151,7 +151,7 @@ static void parport_attach(struct parport *port)
 	device = kzalloc(sizeof(struct pps_client_pp), GFP_KERNEL);
 	if (!device) {
 		pr_err("memory allocation failed, not attaching\n");
-		return;
+		return -ENOMEM;
 	}
 
 	device->pardev = parport_register_device(port, KBUILD_MODNAME,
@@ -179,7 +179,7 @@ static void parport_attach(struct parport *port)
 
 	pr_info("attached to %s\n", port->name);
 
-	return;
+	return 0;
 
 err_release_dev:
 	parport_release(device->pardev);
@@ -187,6 +187,7 @@ err_unregister_dev:
 	parport_unregister_device(device->pardev);
 err_free:
 	kfree(device);
+	return -ENODEV;
 }
 
 static void parport_detach(struct parport *port)
-- 
1.8.1.2

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