This patch replaces the code for getting an unsigned long from a
userspace buffer by a simple call to kstroul_from_user.
This makes it easier to read and less error prone.
Kernel Version: v3.0-rc2
Signed-off-by: Peter Huewe <peterhuewe@xxxxxx>
---
drivers/mfd/ab8500-debugfs.c | 41 +++++++++++------------------------------
1 files changed, 11 insertions(+), 30 deletions(-)
diff --git a/drivers/mfd/ab8500-debugfs.c b/drivers/mfd/ab8500-debugfs.c
index 64748e4..64bdeeb 100644
--- a/drivers/mfd/ab8500-debugfs.c
+++ b/drivers/mfd/ab8500-debugfs.c
@@ -419,20 +419,13 @@ static ssize_t ab8500_bank_write(struct file *file,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
- char buf[32];
- int buf_size;
unsigned long user_bank;
int err;
/* Get userspace string and assure termination */
- buf_size = min(count, (sizeof(buf) - 1));
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = 0;
-
- err = strict_strtoul(buf, 0, &user_bank);
+ err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
if (err)
- return -EINVAL;
+ return err;
if (user_bank >= AB8500_NUM_BANKS) {
dev_err(dev, "debugfs error input > number of banks\n");
@@ -441,7 +434,7 @@ static ssize_t ab8500_bank_write(struct file *file,
debug_bank = user_bank;
- return buf_size;
+ return count;
}
static int ab8500_address_print(struct seq_file *s, void *p)
@@ -459,26 +452,20 @@ static ssize_t ab8500_address_write(struct file *file,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
- char buf[32];
- int buf_size;
unsigned long user_address;
int err;
/* Get userspace string and assure termination */
- buf_size = min(count, (sizeof(buf) - 1));
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = 0;
-
- err = strict_strtoul(buf, 0, &user_address);
+ err = kstrtoul_from_user(user_buf, count, 0, &user_address);
if (err)
- return -EINVAL;
+ return err;
+
if (user_address > 0xff) {
dev_err(dev, "debugfs error input > 0xff\n");
return -EINVAL;
}
debug_address = user_address;
- return buf_size;
+ return count;
}
static int ab8500_val_print(struct seq_file *s, void *p)
@@ -509,20 +496,14 @@ static ssize_t ab8500_val_write(struct file *file,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
- char buf[32];
- int buf_size;
unsigned long user_val;
int err;
/* Get userspace string and assure termination */
- buf_size = min(count, (sizeof(buf)-1));
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = 0;
-
- err = strict_strtoul(buf, 0, &user_val);
+ err = kstrtoul_from_user(user_buf, count, 0, &user_val);
if (err)
- return -EINVAL;
+ return err;
+
if (user_val > 0xff) {
dev_err(dev, "debugfs error input > 0xff\n");
return -EINVAL;
@@ -534,7 +515,7 @@ static ssize_t ab8500_val_write(struct file *file,
return -EINVAL;
}
- return buf_size;
+ return count;
}
static const struct file_operations ab8500_bank_fops = {
--
1.7.3.4
--
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