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pinctrl: Relax user input size in pinmux_select() 

This is debugfs and there is no much sense to strict the user from
sending as much data as they can. The memdup_user_nul() will anyway
fail if there is not enough memory.

Relax the user input size by removing an artificial limitaion.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230604131215.78847-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2023-06-04 16:12:15 +03:00 committed by Linus Walleij
parent 0d8675e1df
commit e3275a89e5
1 changed files with 0 additions and 4 deletions
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4
drivers/pinctrl/pinmux.c
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@ -677,7 +677,6 @@ void pinmux_show_setting(struct seq_file *s,
DEFINE_SHOW_ATTRIBUTE(pinmux_functions);
DEFINE_SHOW_ATTRIBUTE(pinmux_pins);
#define PINMUX_SELECT_MAX 128
static ssize_t pinmux_select(struct file *file, const char __user *user_buf,
size_t len, loff_t *ppos)
{
@ -689,9 +688,6 @@ static ssize_t pinmux_select(struct file *file, const char __user *user_buf,
unsigned int num_groups;
int fsel, gsel, ret;
if (len > PINMUX_SELECT_MAX)
return -ENOMEM;
buf = memdup_user_nul(user_buf, len);
if (IS_ERR(buf))
return PTR_ERR(buf);