linux-kernel - [PATCH 03/14] ALSA: mts64: return proper error values from attach

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Message-Id: <1428492040-5581-4-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Wed,  8 Apr 2015 16:50:29 +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 03/14] ALSA: mts64: 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>
---
 sound/drivers/mts64.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/sound/drivers/mts64.c b/sound/drivers/mts64.c
index 2a008a9..fb6223e 100644
--- a/sound/drivers/mts64.c
+++ b/sound/drivers/mts64.c
@@ -874,32 +874,35 @@ static int snd_mts64_probe_port(struct parport *p)
 	return res;
 }
 
-static void snd_mts64_attach(struct parport *p)
+static int snd_mts64_attach(struct parport *p)
 {
 	struct platform_device *device;
+	int ret;
 
 	device = platform_device_alloc(PLATFORM_DRIVER, device_count);
 	if (!device)
-		return;
+		return -ENOMEM;
 
 	/* Temporary assignment to forward the parport */
 	platform_set_drvdata(device, p);
 
-	if (platform_device_add(device) < 0) {
+	ret = platform_device_add(device);
+	if (ret < 0) {
 		platform_device_put(device);
-		return;
+		return ret;
 	}
 
 	/* Since we dont get the return value of probe
 	 * We need to check if device probing succeeded or not */
 	if (!platform_get_drvdata(device)) {
 		platform_device_unregister(device);
-		return;
+		return -ENODEV;
 	}
 
 	/* register device in global table */
 	platform_devices[device_count] = device;
 	device_count++;
+	return 0;
 }
 
 static void snd_mts64_detach(struct parport *p)
-- 
1.8.1.2

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