[26/70] mxser: remove MOXA_CHKPORTENABLE ioctl

Message ID 20210618061516.662-27-jslaby@suse.cz
State New
Headers show
Series
  • mxser: cleanup
Related show

Commit Message

Jiri Slaby June 18, 2021, 6:14 a.m.
1) MOXA_CHKPORTENABLE is broken at least since commit ecbbfd44a08f (TTY:
   move tty buffers to tty_port) in 2012.
2) The ioctl definition was never exposed to userspace, so noone should
   actually be reliably using this.
3) It's not even mentioned in any of the mxser utilities.

Provided the above, remove this mxser-special ioctl.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/tty/mxser.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

Patch

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 38e12ff17529..ebe657426636 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -51,7 +51,6 @@ 
 
 #define MOXA			0x400
 #define MOXA_GETDATACOUNT	(MOXA + 23)
-#define MOXA_CHKPORTENABLE	(MOXA + 60)
 #define MOXA_HighSpeedOn	(MOXA + 61)
 #define MOXA_GETMSTATUS		(MOXA + 65)
 #define MOXA_SET_OP_MODE	(MOXA + 66)
@@ -1430,18 +1429,11 @@  static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 	struct mxser_port *ip;
 	struct tty_port *port;
 	struct tty_struct *tty;
-	int result, status;
+	int status;
 	unsigned int i, j;
 	int ret = 0;
 
 	switch (cmd) {
-	case MOXA_CHKPORTENABLE:
-		result = 0;
-		for (i = 0; i < MXSER_BOARDS; i++)
-			for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
-				if (mxser_boards[i].ports[j].ioaddr)
-					result |= (1 << i);
-		return put_user(result, (unsigned long __user *)argp);
 	case MOXA_GETDATACOUNT:
 		/* The receive side is locked by port->slock but it isn't
 		   clear that an exact snapshot is worth copying here */