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mfd: ab8500-debug: Convert to kstrtoul_from_user
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Use kstrtoul_from_user for getting an unsigned long from userspace
which is less error prone.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
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srinidhi kasagar authored and Lee Jones committed Mar 7, 2013
1 parent eb1f958 commit 7b830ae
Showing 1 changed file with 30 additions and 70 deletions.
100 changes: 30 additions & 70 deletions drivers/mfd/ab8500-debugfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1479,7 +1479,6 @@ static ssize_t ab8500_bank_write(struct file *file,
unsigned long user_bank;
int err;

/* Get userspace string and assure termination */
err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
if (err)
return err;
Expand Down Expand Up @@ -1512,7 +1511,6 @@ static ssize_t ab8500_address_write(struct file *file,
unsigned long user_address;
int err;

/* Get userspace string and assure termination */
err = kstrtoul_from_user(user_buf, count, 0, &user_address);
if (err)
return err;
Expand All @@ -1522,6 +1520,7 @@ static ssize_t ab8500_address_write(struct file *file,
return -EINVAL;
}
debug_address = user_address;

return count;
}

Expand Down Expand Up @@ -1556,7 +1555,6 @@ static ssize_t ab8500_val_write(struct file *file,
unsigned long user_val;
int err;

/* Get userspace string and assure termination */
err = kstrtoul_from_user(user_buf, count, 0, &user_val);
if (err)
return err;
Expand Down Expand Up @@ -2418,20 +2416,13 @@ static ssize_t ab8500_gpadc_avg_sample_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_avg_sample;
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_avg_sample);
err = kstrtoul_from_user(user_buf, count, 0, &user_avg_sample);
if (err)
return -EINVAL;
return err;

if ((user_avg_sample == SAMPLE_1) || (user_avg_sample == SAMPLE_4)
|| (user_avg_sample == SAMPLE_8)
|| (user_avg_sample == SAMPLE_16)) {
Expand All @@ -2441,7 +2432,8 @@ static ssize_t ab8500_gpadc_avg_sample_write(struct file *file,
"should be egal to 1, 4, 8 or 16\n");
return -EINVAL;
}
return buf_size;

return count;
}

static const struct file_operations ab8500_gpadc_avg_sample_fops = {
Expand Down Expand Up @@ -2469,20 +2461,13 @@ static ssize_t ab8500_gpadc_trig_edge_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_trig_edge;
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_trig_edge);
err = kstrtoul_from_user(user_buf, count, 0, &user_trig_edge);
if (err)
return -EINVAL;
return err;

if ((user_trig_edge == RISING_EDGE)
|| (user_trig_edge == FALLING_EDGE)) {
trig_edge = (u8) user_trig_edge;
Expand All @@ -2492,7 +2477,8 @@ static ssize_t ab8500_gpadc_trig_edge_write(struct file *file,
"Enter 1. Falling edge\n");
return -EINVAL;
}
return buf_size;

return count;
}

static const struct file_operations ab8500_gpadc_trig_edge_fops = {
Expand Down Expand Up @@ -2520,28 +2506,22 @@ static ssize_t ab8500_gpadc_trig_timer_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_trig_timer;
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_trig_timer);
err = kstrtoul_from_user(user_buf, count, 0, &user_trig_timer);
if (err)
return -EINVAL;
return err;

if ((user_trig_timer >= 0) && (user_trig_timer <= 255)) {
trig_timer = (u8) user_trig_timer;
} else {
dev_err(dev, "debugfs error input: "
"should be beetween 0 to 255\n");
return -EINVAL;
}
return buf_size;

return count;
}

static const struct file_operations ab8500_gpadc_trig_timer_fops = {
Expand Down Expand Up @@ -2569,20 +2549,13 @@ static ssize_t ab8500_gpadc_conv_type_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_conv_type;
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_conv_type);
err = kstrtoul_from_user(user_buf, count, 0, &user_conv_type);
if (err)
return -EINVAL;
return err;

if ((user_conv_type == ADC_SW)
|| (user_conv_type == ADC_HW)) {
conv_type = (u8) user_conv_type;
Expand All @@ -2592,7 +2565,8 @@ static ssize_t ab8500_gpadc_conv_type_write(struct file *file,
"Enter 1. ADC HW conversion\n");
return -EINVAL;
}
return buf_size;

return count;
}

static const struct file_operations ab8500_gpadc_conv_type_fops = {
Expand Down Expand Up @@ -2809,21 +2783,14 @@ static ssize_t ab8500_subscribe_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;
unsigned int irq_index;

/* 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 < irq_first) {
dev_err(dev, "debugfs error input < %d\n", irq_first);
return -EINVAL;
Expand All @@ -2843,7 +2810,7 @@ static ssize_t ab8500_subscribe_write(struct file *file,
*/
dev_attr[irq_index] = kmalloc(sizeof(struct device_attribute),
GFP_KERNEL);
event_name[irq_index] = kmalloc(buf_size, GFP_KERNEL);
event_name[irq_index] = kmalloc(count, GFP_KERNEL);
sprintf(event_name[irq_index], "%lu", user_val);
dev_attr[irq_index]->show = show_irq;
dev_attr[irq_index]->store = NULL;
Expand All @@ -2865,29 +2832,22 @@ static ssize_t ab8500_subscribe_write(struct file *file,
return err;
}

return buf_size;
return count;
}

static ssize_t ab8500_unsubscribe_write(struct file *file,
const char __user *user_buf,
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;
unsigned int irq_index;

/* 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 < irq_first) {
dev_err(dev, "debugfs error input < %d\n", irq_first);
return -EINVAL;
Expand All @@ -2912,7 +2872,7 @@ static ssize_t ab8500_unsubscribe_write(struct file *file,
kfree(event_name[irq_index]);
kfree(dev_attr[irq_index]);

return buf_size;
return count;
}

/*
Expand Down

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