diff options
Diffstat (limited to 'drivers/usb/chipidea/debug.c')
| -rw-r--r-- | drivers/usb/chipidea/debug.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index 268e4236e84c..5b7061a33103 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -88,9 +88,13 @@ static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, char buf[32]; int ret; - if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + count = min_t(size_t, sizeof(buf) - 1, count); + if (copy_from_user(buf, ubuf, count)) return -EFAULT; + /* sscanf requires a zero terminated string */ + buf[count] = '\0'; + if (sscanf(buf, "%u", &mode) != 1) return -EINVAL; @@ -336,8 +340,8 @@ static int ci_registers_show(struct seq_file *s, void *unused) struct ci_hdrc *ci = s->private; u32 tmp_reg; - if (!ci) - return 0; + if (!ci || ci->in_lpm) + return -EPERM; /* ------ Registers ----- */ tmp_reg = hw_read_intr_enable(ci); |