diff options
| -rw-r--r-- | drivers/mfd/aat2870-core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mfd/aat2870-core.c b/drivers/mfd/aat2870-core.c index 14d9542a4eed..4e6e03d63e12 100644 --- a/drivers/mfd/aat2870-core.c +++ b/drivers/mfd/aat2870-core.c @@ -303,7 +303,10 @@ static ssize_t aat2870_reg_write_file(struct file *file, while (*start == ' ') start++; - addr = simple_strtoul(start, &start, 16); + ret = kstrtoul(start, 16, &addr); + if (ret) + return ret; + if (addr >= AAT2870_REG_NUM) { dev_err(aat2870->dev, "Invalid address, 0x%lx\n", addr); return -EINVAL; |