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[72.48.98.129]) by smtp.googlemail.com with ESMTPSA id a5sm1322910oii.3.2016.08.24.16.24.44 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 24 Aug 2016 16:24:44 -0700 (PDT) From: Rob Herring To: Greg Kroah-Hartman , Marcel Holtmann , Jiri Slaby , Sebastian Reichel , Arnd Bergmann , "Dr . H . Nikolaus Schaller" , Alan Cox Cc: Loic Poulain , Pavel Machek , Peter Hurley , NeilBrown , Linus Walleij , linux-bluetooth@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 4/6] serio: serport: add support for buffered write and receive Date: Wed, 24 Aug 2016 18:24:35 -0500 Message-Id: <20160824232437.9446-6-robh@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160824232437.9446-1-robh@kernel.org> References: <20160824232437.9446-1-robh@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A tty ldisc naturally supports writing a buffer at a time, so convert the serport driver to use the serio write_buf() function. For clients using the existing interfaces, there is no change in functionality. Signed-off-by: Rob Herring --- drivers/input/serio/serport.c | 43 +++++++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 20 deletions(-) -- 2.9.3 diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c index a938c2b..5572c28 100644 --- a/drivers/input/serio/serport.c +++ b/drivers/input/serio/serport.c @@ -45,10 +45,10 @@ struct serport { * Callback functions from the serio code. */ -static int serport_serio_write(struct serio *serio, unsigned char data) +static int serport_serio_write_buf(struct serio *serio, const unsigned char *data, size_t len) { struct serport *serport = serio->port_data; - return -(serport->tty->ops->write(serport->tty, &data, 1) != 1); + return serport->tty->ops->write(serport->tty, data, len); } static int serport_serio_open(struct serio *serio) @@ -133,26 +133,29 @@ static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *c if (!test_bit(SERPORT_ACTIVE, &serport->flags)) goto out; - for (i = 0; i < count; i++) { - if (fp) { - switch (fp[i]) { - case TTY_FRAME: - ch_flags = SERIO_FRAME; - break; - - case TTY_PARITY: - ch_flags = SERIO_PARITY; - break; - - default: - ch_flags = 0; - break; + if (serio_buffered_mode_enabled(serport->serio)) { + serio_receive_buf(serport->serio, cp, count); + } else { + for (i = 0; i < count; i++) { + if (fp) { + switch (fp[i]) { + case TTY_FRAME: + ch_flags = SERIO_FRAME; + break; + + case TTY_PARITY: + ch_flags = SERIO_PARITY; + break; + + default: + ch_flags = 0; + break; + } } - } - serio_interrupt(serport->serio, cp[i], ch_flags); + serio_interrupt(serport->serio, cp[i], ch_flags); + } } - out: spin_unlock_irqrestore(&serport->lock, flags); } @@ -179,7 +182,7 @@ static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file, u snprintf(serio->phys, sizeof(serio->phys), "%s/serio0", tty_name(tty)); serio->id = serport->id; serio->id.type = SERIO_RS232; - serio->write = serport_serio_write; + serio->write_buf = serport_serio_write_buf; serio->open = serport_serio_open; serio->close = serport_serio_close; serio->port_data = serport;