linux-kernel - [PATCH 1/2] char: pcmcia: cm4000_cs: Fix failure handling Handled failure cases of device

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Date:   Mon, 24 May 2021 01:00:28 +0530
From:   nizamhaider786@...il.com
To:     laforge@...monks.org
Cc:     arnd@...db.de, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org,
        Nijam Haider <nizamhaider786@...il.com>
Subject: [PATCH 1/2] char: pcmcia: cm4000_cs: Fix failure handling Handled failure cases of device_create()

From: Nijam Haider <nizamhaider786@...il.com>

Signed-off-by: Nijam Haider <nizamhaider786@...il.com>
---
 drivers/char/pcmcia/cm4000_cs.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 89681f0..d6f5598 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -1783,6 +1783,7 @@ static int cm4000_probe(struct pcmcia_device *link)
 {
 	struct cm4000_dev *dev;
 	int i, ret;
+	struct device *dev_ret;
 
 	for (i = 0; i < CM4000_MAX_DEV; i++)
 		if (dev_table[i] == NULL)
@@ -1814,8 +1815,15 @@ static int cm4000_probe(struct pcmcia_device *link)
 		return ret;
 	}
 
-	device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
-
+	dev_ret = device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
+        if (IS_ERR(dev_ret)) {
+               	printk(KERN_ERR "device_create failed for %d\n",
+                       	       i);
+		cm4000_release(link);
+                dev_table[i] = NULL;
+		kfree(dev);
+		return -ENODEV;
+	}
 	return 0;
 }
 
-- 
2.7.4