diff options
Diffstat (limited to 'drivers/acpi/proc.c')
| -rw-r--r-- | drivers/acpi/proc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c index d0d550d22a6d..d0d25e2e1ced 100644 --- a/drivers/acpi/proc.c +++ b/drivers/acpi/proc.c @@ -393,11 +393,13 @@ acpi_system_write_wakeup_device(struct file *file, struct list_head *node, *next; char strbuf[5]; char str[5] = ""; - int len = count; + unsigned int len = count; struct acpi_device *found_dev = NULL; if (len > 4) len = 4; + if (len < 0) + return -EFAULT; if (copy_from_user(strbuf, buffer, len)) return -EFAULT; |