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path: root/drivers/char/briq_panel.c
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Diffstat (limited to 'drivers/char/briq_panel.c')
-rw-r--r--drivers/char/briq_panel.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c
index a0e5eac5f33..b8c22255f6a 100644
--- a/drivers/char/briq_panel.c
+++ b/drivers/char/briq_panel.c
@@ -87,7 +87,7 @@ static int briq_panel_release(struct inode *ino, struct file *filep)
return 0;
}
-static ssize_t briq_panel_read(struct file *file, char *buf, size_t count,
+static ssize_t briq_panel_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
unsigned short c;
@@ -135,7 +135,7 @@ static void scroll_vfd( void )
vfd_cursor = 20;
}
-static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len,
+static ssize_t briq_panel_write(struct file *file, const char __user *buf, size_t len,
loff_t *ppos)
{
size_t indx = len;
@@ -150,19 +150,22 @@ static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len,
return -EBUSY;
for (;;) {
+ char c;
if (!indx)
break;
+ if (get_user(c, buf))
+ return -EFAULT;
if (esc) {
- set_led(*buf);
+ set_led(c);
esc = 0;
- } else if (*buf == 27) {
+ } else if (c == 27) {
esc = 1;
- } else if (*buf == 12) {
+ } else if (c == 12) {
/* do a form feed */
for (i=0; i<40; i++)
vfd[i] = ' ';
vfd_cursor = 0;
- } else if (*buf == 10) {
+ } else if (c == 10) {
if (vfd_cursor < 20)
vfd_cursor = 20;
else if (vfd_cursor < 40)
@@ -175,7 +178,7 @@ static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len,
/* just a character */
if (vfd_cursor > 39)
scroll_vfd();
- vfd[vfd_cursor++] = *buf;
+ vfd[vfd_cursor++] = c;
}
indx--;
buf++;
@@ -202,7 +205,7 @@ static struct miscdevice briq_panel_miscdev = {
static int __init briq_panel_init(void)
{
struct device_node *root = find_path_device("/");
- char *machine;
+ const char *machine;
int i;
machine = get_property(root, "model", NULL);