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| author | Jiri Slaby <jslaby@suse.cz> | 2012-08-08 22:26:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-13 16:45:38 -0700 |
| commit | 0019b4089ccef8148d8be83cc8adfc81a75b47d4 (patch) | |
| tree | 4db275fb4c29f9e7f2da85f136dc9f733b26d3eb /drivers/tty/tty_io.c | |
| parent | 16a02081baa15becdb7d6460659e7832e6524d93 (diff) | |
| download | linux-stable-0019b4089ccef8148d8be83cc8adfc81a75b47d4.tar.gz linux-stable-0019b4089ccef8148d8be83cc8adfc81a75b47d4.tar.bz2 linux-stable-0019b4089ccef8148d8be83cc8adfc81a75b47d4.zip | |
TTY: add support for unnumbered device nodes
This allows drivers like ttyprintk to avoid hacks to create an
unnumbered node in /dev. It used to set TTY_DRIVER_DYNAMIC_DEV in
flags and call device_create on its own. That is incorrect, because
TTY_DRIVER_DYNAMIC_DEV may be set only if tty_register_device is
called explicitly.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_io.c')
| -rw-r--r-- | drivers/tty/tty_io.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index a67609b9f21b..4d9898c2b641 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1216,7 +1216,10 @@ static void pty_line_name(struct tty_driver *driver, int index, char *p) */ static void tty_line_name(struct tty_driver *driver, int index, char *p) { - sprintf(p, "%s%d", driver->name, index + driver->name_base); + if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE) + strcpy(p, driver->name); + else + sprintf(p, "%s%d", driver->name, index + driver->name_base); } /** @@ -3076,7 +3079,7 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, struct tty_driver *driver; int err; - if (!lines) + if (!lines || (flags & TTY_DRIVER_UNNUMBERED_NODE && lines > 1)) return ERR_PTR(-EINVAL); driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL); |