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

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Message-Id: <1406279557-26754-1-git-send-email-pramod.gurav@smartplayin.com>
Date:	Fri, 25 Jul 2014 14:42:37 +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
- Removes the error lables and instead releases resources and returns
  after failures

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>
---

Changes since v1:
- Removes de_err logs on OOM cases which is not needed.

 drivers/input/misc/soc_button_array.c |   27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
index 5a6334b..f421cf4 100644
--- a/drivers/input/misc/soc_button_array.c
+++ b/drivers/input/misc/soc_button_array.c
@@ -83,6 +83,11 @@ soc_button_device_create(struct pnp_dev *pdev,
 				       sizeof(*gpio_keys_pdata) +
 					sizeof(*gpio_keys) * MAX_NBUTTONS,
 				       GFP_KERNEL);
+	if (!gpio_keys_pdata) {
+		error = -ENOMEM;
+		return ERR_PTR(error);
+	}
+
 	gpio_keys = (void *)(gpio_keys_pdata + 1);
 
 	for (info = button_info; info->name; info++) {
@@ -104,7 +109,7 @@ soc_button_device_create(struct pnp_dev *pdev,
 
 	if (n_buttons == 0) {
 		error = -ENODEV;
-		goto err_free_mem;
+		return ERR_PTR(error);
 	}
 
 	gpio_keys_pdata->buttons = gpio_keys;
@@ -114,25 +119,23 @@ soc_button_device_create(struct pnp_dev *pdev,
 	pd = platform_device_alloc("gpio-keys", PLATFORM_DEVID_AUTO);
 	if (!pd) {
 		error = -ENOMEM;
-		goto err_free_mem;
+		return ERR_PTR(error);
 	}
 
 	error = platform_device_add_data(pd, gpio_keys_pdata,
 					 sizeof(*gpio_keys_pdata));
-	if (error)
-		goto err_free_pdev;
+	if (error) {
+		platform_device_put(pd);
+		return ERR_PTR(error);
+	}
 
 	error = platform_device_add(pd);
-	if (error)
-		goto err_free_pdev;
+	if (error) {
+		platform_device_put(pd);
+		return ERR_PTR(error);
+	}
 
 	return pd;
-
-err_free_pdev:
-	platform_device_put(pd);
-err_free_mem:
-	devm_kfree(&pdev->dev, gpio_keys_pdata);
-	return ERR_PTR(error);
 }
 
 static void soc_button_remove(struct pnp_dev *pdev)
-- 
1.7.9.5

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