Char: mxser, ratelimit ioctl warning

The GET_MAJOR ioctl prints out a warning, make it ratelimited.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index e30575e87648..b638403e8e9c 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1612,8 +1612,10 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 
         switch (cmd) {
         case MOXA_GET_MAJOR:
-                printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl %x, fix "
-                                "your userspace\n", current->comm, cmd);
+                if (printk_ratelimit())
+                        printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
+                                        "%x (GET_MAJOR), fix your userspace\n",
+                                        current->comm, cmd);
                 return put_user(ttymajor, (int __user *)argp);
 
         case MOXA_CHKPORTENABLE: