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Subject[PATCH v3 1/2] char: pcmcia: scr24x_cs: Fix failure handling of device_create()
Date
From: Nijam Haider <nizamhaider786@gmail.com>

Ignored error in device_create() and pcmcia_enable_device()
this patch implements proper error handling.

Signed-off-by: Nijam Haider <nizamhaider786@gmail.com>
---
V2 -> V3: Added description, Changelog and removed whitespace error
V1 -> V2: Split the patch into two parts and addressed review comments
---
drivers/char/pcmcia/scr24x_cs.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/char/pcmcia/scr24x_cs.c b/drivers/char/pcmcia/scr24x_cs.c
index 47feb39af34c..b48e79356611 100644
--- a/drivers/char/pcmcia/scr24x_cs.c
+++ b/drivers/char/pcmcia/scr24x_cs.c
@@ -233,6 +233,7 @@ static int scr24x_probe(struct pcmcia_device *link)
{
struct scr24x_dev *dev;
int ret;
+ struct device *dev_ret;

dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
@@ -272,12 +273,20 @@ static int scr24x_probe(struct pcmcia_device *link)

ret = pcmcia_enable_device(link);
if (ret < 0) {
+ cdev_del(&dev->c_dev);
pcmcia_disable_device(link);
goto err;
}

- device_create(scr24x_class, NULL, MKDEV(MAJOR(scr24x_devt), dev->devno),
+ dev_ret = device_create(scr24x_class, NULL, MKDEV(MAJOR(scr24x_devt), dev->devno),
NULL, "scr24x%d", dev->devno);
+ if (IS_ERR(dev_ret)) {
+ dev_err(&link->dev, "device_create failed for %d\n",
+ dev->devno);
+ cdev_del(&dev->c_dev);
+ pcmcia_disable_device(link);
+ goto err;
+ }

dev_info(&link->dev, "SCR24x Chip Card Interface\n");
return 0;
--
2.7.4
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