From: Jiri Slaby Register tty indexes only for real devices, udev then creates nodes for them (and only for them). Move tty_register_driver before probing, to be correct when calling tty_register_device. Also tell tty layer by tty_driver flags, that we are registering devices. Cc: Alan Cox Signed-off-by: Jiri Slaby Signed-off-by: Andrew Morton --- drivers/char/mxser_new.c | 38 ++++++++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 11 deletions(-) diff -puN drivers/char/mxser_new.c~char-mxser_new-register-tty-devices-on-the-fly drivers/char/mxser_new.c --- a/drivers/char/mxser_new.c~char-mxser_new-register-tty-devices-on-the-fly +++ a/drivers/char/mxser_new.c @@ -2830,12 +2830,19 @@ static int __init mxser_module_init(void mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; mxvar_sdriver->init_termios = tty_std_termios; mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; - mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW; + mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; tty_set_operations(mxvar_sdriver, &mxser_ops); mxvar_sdriver->ttys = mxvar_tty; mxvar_sdriver->termios = mxvar_termios; mxvar_sdriver->termios_locked = mxvar_termios_locked; + retval = tty_register_driver(mxvar_sdriver); + if (retval) { + printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " + "tty driver !\n"); + goto err_put; + } + mxvar_diagflag = 0; m = 0; @@ -2885,6 +2892,10 @@ static int __init mxser_module_init(void if (mxser_initbrd(brd) < 0) continue; + for (i = 0; i < brd->nports; i++) + tty_register_device(mxvar_sdriver, + m * MXSER_PORTS_PER_BOARD + i, NULL); + m++; } @@ -2939,6 +2950,11 @@ static int __init mxser_module_init(void /* mxser_initbrd will hook ISR. */ if (mxser_initbrd(brd) < 0) continue; + for (i = 0; i < brd->nports; i++) + tty_register_device(mxvar_sdriver, + m * MXSER_PORTS_PER_BOARD + i, + &pdev->dev); + m++; /* Keep an extra reference if we succeeded. It will be returned at unload time */ @@ -2946,20 +2962,18 @@ static int __init mxser_module_init(void } } - retval = tty_register_driver(mxvar_sdriver); - if (retval) { - printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family" - " driver !\n"); - put_tty_driver(mxvar_sdriver); - - for (i = 0; i < MXSER_BOARDS; i++) - if (mxser_boards[i].board_type != -1) - mxser_release_res(&mxser_boards[i], 1); - return retval; + if (!m) { + retval = -ENODEV; + goto err_unr; } pr_debug("Done.\n"); + return 0; +err_unr: + tty_unregister_driver(mxvar_sdriver); +err_put: + put_tty_driver(mxvar_sdriver); return retval; } @@ -2969,6 +2983,8 @@ static void __exit mxser_module_exit(voi pr_debug("Unloading module mxser ...\n"); + for (i = 0; i < MXSER_PORTS; i++) + tty_unregister_device(mxvar_sdriver, i); tty_unregister_driver(mxvar_sdriver); put_tty_driver(mxvar_sdriver); _