linux-kernel - [PATCH 18/24] Staging: ipack/devices/ipoctal: Check tty_register

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Date:	Wed, 12 Sep 2012 14:55:40 +0200
From:	Samuel Iglesias Gonsalvez <siglesias@...lia.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	industrypack-devel@...ts.sourceforge.net,
	Jens Taprogge <jens.taprogge@...rogge.org>,
	Samuel Iglesias Gonsalvez <siglesias@...lia.com>
Subject: [PATCH 18/24] Staging: ipack/devices/ipoctal: Check tty_register_device return value.

From: Jens Taprogge <jens.taprogge@...rogge.org>

Signed-off-by: Jens Taprogge <jens.taprogge@...rogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@...lia.com>
---
 drivers/staging/ipack/devices/ipoctal.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c
index b84ab5e..7371270 100644
--- a/drivers/staging/ipack/devices/ipoctal.c
+++ b/drivers/staging/ipack/devices/ipoctal.c
@@ -437,6 +437,8 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
 	ipoctal->tty_drv = tty;
 
 	for (i = 0; i < NR_CHANNELS; i++) {
+		struct device *tty_dev;
+
 		channel = &ipoctal->channel[i];
 		tty_port_init(&channel->tty_port);
 		tty_port_alloc_xmit_buf(&channel->tty_port);
@@ -450,7 +452,11 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
 		channel->pointer_read = 0;
 		channel->pointer_write = 0;
 		channel->nb_bytes = 0;
-		tty_register_device(tty, i, NULL);
+		tty_dev = tty_register_device(tty, i, NULL);
+		if (IS_ERR(tty_dev)) {
+			dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n");
+			continue;
+		}
 
 		/*
 		 * Enable again the RX. TX will be enabled when
-- 
1.7.10.4

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