linux-kernel - [PATCH REBASE 3/3] staging: media: atomisp: Don't abort on error in module exit path

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Date:   Tue, 22 Sep 2020 10:09:10 +0100
From:   Alex Dewar <alex.dewar90@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alex Dewar <alex.dewar90@...il.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Alan Cox <alan@...ux.intel.com>, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH REBASE 3/3] staging: media: atomisp: Don't abort on error in module exit path

The function lm3554_remove() checks for the return code for
lm3554_gpio_uninit() even though this is on the exit path and exits the
function, leaving the variable flash unfreed. Instead, print a warning and
free flash unconditionally.

Signed-off-by: Alex Dewar <alex.dewar90@...il.com>
---
 .../staging/media/atomisp/i2c/atomisp-lm3554.c  | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c b/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c
index 5e895586e80a..84c47c1f9eb4 100644
--- a/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c
+++ b/drivers/staging/media/atomisp/i2c/atomisp-lm3554.c
@@ -794,7 +794,7 @@ static int lm3554_gpio_init(struct i2c_client *client)
 	return ret;
 }
 
-static int lm3554_gpio_uninit(struct i2c_client *client)
+static void lm3554_gpio_uninit(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct lm3554 *flash = to_lm3554(sd);
@@ -803,15 +803,16 @@ static int lm3554_gpio_uninit(struct i2c_client *client)
 
 	ret = gpio_direction_output(pdata->gpio_strobe, 0);
 	if (ret < 0)
-		return ret;
+		dev_err(&client->dev,
+			"gpio request/direction_output fail for gpio_strobe");
 
 	ret = gpio_direction_output(pdata->gpio_reset, 0);
 	if (ret < 0)
-		return ret;
+		dev_err(&client->dev,
+			"gpio request/direction_output fail for gpio_reset");
 
 	gpio_free(pdata->gpio_strobe);
 	gpio_free(pdata->gpio_reset);
-	return 0;
 }
 
 static void *lm3554_platform_data_func(struct i2c_client *client)
@@ -918,7 +919,6 @@ static int lm3554_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
 	struct lm3554 *flash = to_lm3554(sd);
-	int ret;
 
 	media_entity_cleanup(&flash->sd.entity);
 	v4l2_ctrl_handler_free(&flash->ctrl_handler);
@@ -928,16 +928,11 @@ static int lm3554_remove(struct i2c_client *client)
 
 	del_timer_sync(&flash->flash_off_delay);
 
-	ret = lm3554_gpio_uninit(client);
-	if (ret < 0)
-		goto fail;
+	lm3554_gpio_uninit(client);
 
 	kfree(flash);
 
 	return 0;
-fail:
-	dev_err(&client->dev, "gpio request/direction_output fail");
-	return ret;
 }
 
 static const struct dev_pm_ops lm3554_pm_ops = {
-- 
2.28.0