linux-kernel - [PATCH v2] Input: soc_button_array: Remove kfree on data allocated with devm

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Date:	Fri, 25 Jul 2014 17:04:34 +0530
From:	pramod.gurav.etc@...il.com
To:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Pramod Gurav <pramod.gurav@...rtplayin.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Lejun Zhu <lejun.zhu@...ux.intel.com>,
	Sachin Kamat <sachin.kamat@...aro.org>
Subject: [PATCH v2] Input: soc_button_array: Remove kfree on data allocated with devm_zalloc

From: Pramod Gurav <pramod.gurav@...rtplayin.com>

This patch does below:
- Removes kfree done on data allocated with devm_zalloc in probe
  path of the driver.
- Adds a check on return value from devm_kzalloc which was missing

CC: Dmitry Torokhov <dmitry.torokhov@...il.com>
CC: Lejun Zhu <lejun.zhu@...ux.intel.com>
CC: Sachin Kamat <sachin.kamat@...aro.org>

Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
---
 drivers/input/misc/soc_button_array.c |   17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
index 5a6334b..fc64ec6 100644
--- a/drivers/input/misc/soc_button_array.c
+++ b/drivers/input/misc/soc_button_array.c
@@ -83,6 +83,9 @@ soc_button_device_create(struct pnp_dev *pdev,
 				       sizeof(*gpio_keys_pdata) +
 					sizeof(*gpio_keys) * MAX_NBUTTONS,
 				       GFP_KERNEL);
+	if (!gpio_keys_pdata)
+		return ERR_PTR(-ENOMEM);
+
 	gpio_keys = (void *)(gpio_keys_pdata + 1);
 
 	for (info = button_info; info->name; info++) {
@@ -102,20 +105,16 @@ soc_button_device_create(struct pnp_dev *pdev,
 		n_buttons++;
 	}
 
-	if (n_buttons == 0) {
-		error = -ENODEV;
-		goto err_free_mem;
-	}
+	if (n_buttons == 0)
+		return ERR_PTR(-ENODEV);
 
 	gpio_keys_pdata->buttons = gpio_keys;
 	gpio_keys_pdata->nbuttons = n_buttons;
 	gpio_keys_pdata->rep = autorepeat;
 
 	pd = platform_device_alloc("gpio-keys", PLATFORM_DEVID_AUTO);
-	if (!pd) {
-		error = -ENOMEM;
-		goto err_free_mem;
-	}
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
 
 	error = platform_device_add_data(pd, gpio_keys_pdata,
 					 sizeof(*gpio_keys_pdata));
@@ -130,8 +129,6 @@ soc_button_device_create(struct pnp_dev *pdev,
 
 err_free_pdev:
 	platform_device_put(pd);
-err_free_mem:
-	devm_kfree(&pdev->dev, gpio_keys_pdata);
 	return ERR_PTR(error);
 }
 
-- 
1.7.9.5

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