diff options
Diffstat (limited to 'drivers/char/briq_panel.c')
| -rw-r--r-- | drivers/char/briq_panel.c | 19 |
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); |