[PATCH] mfd-dm355evm_msp: One function call less in add_child() after error detection

SF Markus Elfring
2015-12-29T13:04:36Z

Date: Tue, 29 Dec 2015 13:56:42 +0100

The platform_device_put() function was called in one case by the
add_child() function during error handling even if the passed
variable "pdev" contained a null pointer.

Implementation details could be improved by the adjustment of jump targets
according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/mfd/dm355evm_msp.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/mfd/dm355evm_msp.c b/drivers/mfd/dm355evm_msp.c
index bc90efe..e4aa1b8 100644
--- a/drivers/mfd/dm355evm_msp.c
+++ b/drivers/mfd/dm355evm_msp.c
@@ -202,7 +202,7 @@ static struct device *add_child(struct i2c_client *client, const char *name,
if (!pdev) {
dev_dbg(&client->dev, "can't alloc dev\n");
status = -ENOMEM;
- goto err;
+ goto report_failure;
}

device_init_wakeup(&pdev->dev, can_wakeup);
@@ -212,7 +212,7 @@ static struct device *add_child(struct i2c_client *client, const char *name,
status = platform_device_add_data(pdev, pdata, pdata_len);
if (status < 0) {
dev_dbg(&pdev->dev, "can't add platform_data\n");
- goto err;
+ goto put_device;
}
}

@@ -225,19 +225,18 @@ static struct device *add_child(struct i2c_client *client, const char *name,
status = platform_device_add_resources(pdev, &r, 1);
if (status < 0) {
dev_dbg(&pdev->dev, "can't add irq\n");
- goto err;
+ goto put_device;
}
}

status = platform_device_add(pdev);
-
-err:
- if (status < 0) {
- platform_device_put(pdev);
- dev_err(&client->dev, "can't add %s dev\n", name);
- return ERR_PTR(status);
- }
- return &pdev->dev;
+ if (!status)
+ return &pdev->dev;
+put_device:
+ platform_device_put(pdev);
+report_failure:
+ dev_err(&client->dev, "can't add %s dev\n", name);
+ return ERR_PTR(status);
}

static int add_children(struct i2c_client *client)
--
2.6.3