netdev - [PATCH 06/14] spi: butterfly: return proper error values from attach

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Date:	Wed,  8 Apr 2015 16:50:32 +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 06/14] spi: butterfly: 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/spi/spi-butterfly.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-butterfly.c b/drivers/spi/spi-butterfly.c
index 9a95862..7df16c8 100644
--- a/drivers/spi/spi-butterfly.c
+++ b/drivers/spi/spi-butterfly.c
@@ -190,7 +190,7 @@ static struct flash_platform_data flash = {
 /* REVISIT remove this ugly global and its "only one" limitation */
 static struct butterfly *butterfly;
 
-static void butterfly_attach(struct parport *p)
+static int butterfly_attach(struct parport *p)
 {
 	struct pardevice	*pd;
 	int			status;
@@ -199,7 +199,7 @@ static void butterfly_attach(struct parport *p)
 	struct device		*dev = p->physport->dev;
 
 	if (butterfly || !dev)
-		return;
+		return -ENODEV;
 
 	/* REVISIT:  this just _assumes_ a butterfly is there ... no probe,
 	 * and no way to be selective about what it binds to.
@@ -287,7 +287,7 @@ static void butterfly_attach(struct parport *p)
 
 	pr_info("%s: AVR Butterfly\n", p->name);
 	butterfly = pp;
-	return;
+	return 0;
 
 clean2:
 	/* turn off VCC */
@@ -300,6 +300,7 @@ clean0:
 	(void) spi_master_put(pp->bitbang.master);
 done:
 	pr_debug("%s: butterfly probe, fail %d\n", p->name, status);
+	return status;
 }
 
 static void butterfly_detach(struct parport *p)
-- 
1.8.1.2

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