linux-kernel - [PATCH] lib: cleanup kstrto*() usage

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Date:   Sun, 22 Nov 2020 15:34:10 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] lib: cleanup kstrto*() usage

Use proper conversion functions.
kstrto*() variants exist for all standard types.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 lib/test_firmware.c |    9 +++------
 lib/test_kmod.c     |   26 ++++++++++----------------
 2 files changed, 13 insertions(+), 22 deletions(-)

--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -364,18 +364,15 @@ static ssize_t test_dev_config_show_int(char *buf, int val)
 
 static int test_dev_config_update_u8(const char *buf, size_t size, u8 *cfg)
 {
+	u8 val;
 	int ret;
-	long new;
 
-	ret = kstrtol(buf, 10, &new);
+	ret = kstrtou8(buf, 10, &val);
 	if (ret)
 		return ret;
 
-	if (new > U8_MAX)
-		return -EINVAL;
-
 	mutex_lock(&test_fw_mutex);
-	*(u8 *)cfg = new;
+	*(u8 *)cfg = val;
 	mutex_unlock(&test_fw_mutex);
 
 	/* Always return full write size even if we didn't consume all */
--- a/lib/test_kmod.c
+++ b/lib/test_kmod.c
@@ -877,20 +877,17 @@ static int test_dev_config_update_uint_sync(struct kmod_test_device *test_dev,
 					    int (*test_sync)(struct kmod_test_device *test_dev))
 {
 	int ret;
-	unsigned long new;
+	unsigned int val;
 	unsigned int old_val;
 
-	ret = kstrtoul(buf, 10, &new);
+	ret = kstrtouint(buf, 10, &val);
 	if (ret)
 		return ret;
 
-	if (new > UINT_MAX)
-		return -EINVAL;
-
 	mutex_lock(&test_dev->config_mutex);
 
 	old_val = *config;
-	*(unsigned int *)config = new;
+	*(unsigned int *)config = val;
 
 	ret = test_sync(test_dev);
 	if (ret) {
@@ -914,18 +911,18 @@ static int test_dev_config_update_uint_range(struct kmod_test_device *test_dev,
 					     unsigned int min,
 					     unsigned int max)
 {
+	unsigned int val;
 	int ret;
-	unsigned long new;
 
-	ret = kstrtoul(buf, 10, &new);
+	ret = kstrtouint(buf, 10, &val);
 	if (ret)
 		return ret;
 
-	if (new < min || new > max)
+	if (val < min || val > max)
 		return -EINVAL;
 
 	mutex_lock(&test_dev->config_mutex);
-	*config = new;
+	*config = val;
 	mutex_unlock(&test_dev->config_mutex);
 
 	/* Always return full write size even if we didn't consume all */
@@ -936,18 +933,15 @@ static int test_dev_config_update_int(struct kmod_test_device *test_dev,
 				      const char *buf, size_t size,
 				      int *config)
 {
+	int val;
 	int ret;
-	long new;
 
-	ret = kstrtol(buf, 10, &new);
+	ret = kstrtoint(buf, 10, &val);
 	if (ret)
 		return ret;
 
-	if (new < INT_MIN || new > INT_MAX)
-		return -EINVAL;
-
 	mutex_lock(&test_dev->config_mutex);
-	*config = new;
+	*config = val;
 	mutex_unlock(&test_dev->config_mutex);
 	/* Always return full write size even if we didn't consume all */
 	return size;