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path: root/drivers/mfd/aat2870-core.c
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Diffstat (limited to 'drivers/mfd/aat2870-core.c')
-rw-r--r--drivers/mfd/aat2870-core.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mfd/aat2870-core.c b/drivers/mfd/aat2870-core.c
index 14d9542..4e6e03d 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;
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