diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-05-05 11:19:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 17:03:20 +0200 |
| commit | 03b3b1a2405ccd71570cd5ec1fe4abd7bb4891cb (patch) | |
| tree | 0ae4a17baec05a793d8c64948e17b1adaa1a8999 /arch/um | |
| parent | 0f29b503bd0b48ec6f14243f3626ac411c879555 (diff) | |
tty: make tty_operations::write_room return uint
Line disciplines expect a positive value or zero returned from
tty->ops->write_room (invoked by tty_write_room). So make this
assumption explicit by using unsigned int as a return value. Both of
tty->ops->write_room and tty_write_room.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Acked-by: Alex Elder <elder@linaro.org>
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # xtensa
Acked-by: David Sterba <dsterba@suse.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Chris Zankel <chris@zankel.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Cc: Jens Taprogge <jens.taprogge@taprogge.org>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Scott Branden <scott.branden@broadcom.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Lin <dtwlin@gmail.com>
Cc: Johan Hovold <johan@kernel.org>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Oliver Neukum <oneukum@suse.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Link: https://lore.kernel.org/r/20210505091928.22010-23-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/line.c | 6 | ||||
| -rw-r--r-- | arch/um/drivers/line.h | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 1c70a31e7c5b..2b8810ba5470 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -32,7 +32,7 @@ static irqreturn_t line_interrupt(int irq, void *data) * * Should be called while holding line->lock (this does not modify data). */ -static int write_room(struct line *line) +static unsigned int write_room(struct line *line) { int n; @@ -47,11 +47,11 @@ static int write_room(struct line *line) return n - 1; } -int line_write_room(struct tty_struct *tty) +unsigned int line_write_room(struct tty_struct *tty) { struct line *line = tty->driver_data; unsigned long flags; - int room; + unsigned int room; spin_lock_irqsave(&line->lock, flags); room = write_room(line); diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h index 01d21e76144f..861edf329569 100644 --- a/arch/um/drivers/line.h +++ b/arch/um/drivers/line.h @@ -70,7 +70,7 @@ extern void line_set_termios(struct tty_struct *tty, struct ktermios * old); extern int line_chars_in_buffer(struct tty_struct *tty); extern void line_flush_buffer(struct tty_struct *tty); extern void line_flush_chars(struct tty_struct *tty); -extern int line_write_room(struct tty_struct *tty); +extern unsigned int line_write_room(struct tty_struct *tty); extern void line_throttle(struct tty_struct *tty); extern void line_unthrottle(struct tty_struct *tty); |