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From:   nizamhaider786@gmail.com
To:     laforge@gnumonks.org
Cc:     arnd@arndb.de, gregkh@linuxfoundation.org,
        linux-kernel@vger.kernel.org,
        Nijam Haider <nizamhaider786@gmail.com>
Subject: [PATCH v2 2/2] char: pcmcia: cm4040_cs: Fix failure handling
Date:   Tue, 25 May 2021 04:32:35 +0530
Message-Id: <20210524230235.571-2-nizamhaider786@gmail.com>
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From: Nijam Haider <nizamhaider786@gmail.com>

Handled failure cases of device_create()

Signed-off-by: Nijam Haider <nizamhaider786@gmail.com>
---
V1 -> V2: Added description and changelog
---
 drivers/char/pcmcia/cm4040_cs.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index d5e43606339c..526198be91fa 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -558,6 +558,7 @@ static void reader_release(struct pcmcia_device *link)
 static int reader_probe(struct pcmcia_device *link)
 {
 	struct reader_dev *dev;
+	struct device *dev_ret;
 	int i, ret;
 
 	for (i = 0; i < CM_MAX_DEV; i++) {
@@ -593,8 +594,14 @@ static int reader_probe(struct pcmcia_device *link)
 		return ret;
 	}
 
-	device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
-
+	dev_ret = device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
+	if (IS_ERR(dev_ret)) {
+		dev_err(&link->dev, "device_create failed for %d\n", i);
+		reader_release(link);
+		dev_table[i] = NULL;
+		kfree(dev);
+		return -ENODEV;
+	}
 	return 0;
 }
 
-- 
2.7.4