From: Mathieu OTHACEHE <m.othacehe@gmail.com>
To: johan@kernel.org, gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
Mathieu OTHACEHE <m.othacehe@gmail.com>
Subject: [PATCH v2 15/22] usb: serial: ti_usb_3410_5052: Check old_termios parameter in set_termios
Date: Tue, 26 Jul 2016 19:59:55 +0200 [thread overview]
Message-ID: <20160726180002.2398-16-m.othacehe@gmail.com> (raw)
In-Reply-To: <20160726180002.2398-1-m.othacehe@gmail.com>
The old_termios parameter is never used in set_termios callback.
Add a check to old_termios to see if we can return right away because
there is nothing to change.
Also pass NULL for old_termios in open callback because it is the
initial call to set_termios.
Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com>
---
Changelog:
v2:
* Deal with DTR and RTS raising in the next patch.
drivers/usb/serial/ti_usb_3410_5052.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index b5ea850..d488237 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -740,7 +740,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
}
if (tty)
- ti_set_termios(tty, port, &tty->termios);
+ ti_set_termios(tty, port, NULL);
status = ti_send_ctrl_urb(serial, TI_OPEN_PORT, open_settings,
TI_UART1_PORT + port_number);
@@ -780,7 +780,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
usb_clear_halt(dev, port->read_urb->pipe);
if (tty)
- ti_set_termios(tty, port, &tty->termios);
+ ti_set_termios(tty, port, NULL);
status = ti_send_ctrl_urb(serial, TI_OPEN_PORT, open_settings,
TI_UART1_PORT + port_number);
@@ -993,6 +993,13 @@ static void ti_set_termios(struct tty_struct *tty,
cflag = tty->termios.c_cflag;
iflag = tty->termios.c_iflag;
+ if (old_termios &&
+ !tty_termios_hw_change(&tty->termios, old_termios) &&
+ tty->termios.c_iflag == old_termios->c_iflag) {
+ dev_dbg(&port->dev, "%s - nothing to change\n", __func__);
+ return;
+ }
+
dev_dbg(&port->dev,
"%s - cflag 0x%08x, iflag 0x%08x\n", __func__, cflag, iflag);
--
2.9.0
next prev parent reply other threads:[~2016-07-26 18:04 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-26 17:59 [PATCH v2 00/22] usb: serial: ti_usb_3410_5052: clean driver Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 01/22] usb: serial: ti_usb_3410_5052: Do not use __uX types Mathieu OTHACEHE
2016-08-23 7:44 ` Johan Hovold
2016-07-26 17:59 ` [PATCH v2 02/22] usb: serial: ti_usb_3410_5052: Remove useless dev_dbg messages Mathieu OTHACEHE
2016-08-23 7:52 ` Johan Hovold
2016-07-26 17:59 ` [PATCH v2 03/22] usb: serial: ti_usb_3410_5052: Use kzalloc instead of kmalloc Mathieu OTHACEHE
2016-07-27 8:09 ` Oliver Neukum
2016-07-27 12:46 ` Mathieu OTHACEHE
2016-08-23 7:54 ` Johan Hovold
2016-07-27 11:21 ` Sergei Shtylyov
2016-07-26 17:59 ` [PATCH v2 04/22] usb: serial: ti_usb_3410_5052: Remove useless NULL-testing Mathieu OTHACEHE
2016-08-23 8:04 ` Johan Hovold
2016-07-26 17:59 ` [PATCH v2 05/22] usb: serial: ti_usb_3410_5052: Use C_X macros instead of c_cflag manipulation Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 06/22] usb: serial: ti_usb_3410_5052: Remove unused variables Mathieu OTHACEHE
2016-08-23 8:15 ` Johan Hovold
2016-07-26 17:59 ` [PATCH v2 07/22] usb: serial: ti_usb_3410_5052: Use macros instead of magic values Mathieu OTHACEHE
2016-08-23 8:19 ` Johan Hovold
2016-07-26 17:59 ` [PATCH v2 08/22] usb: serial: ti_usb_3410_5052: Remove in_sync and out_sync functions Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 09/22] usb: serial: ti_usb_3410_5052: Remove useless tty_wakeup Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 10/22] usb: serial: ti_usb_3410_5052: Change ti_write_byte function arguments Mathieu OTHACEHE
2016-07-27 8:13 ` Oliver Neukum
2016-07-27 16:08 ` Mathieu OTHACEHE
2016-07-27 19:10 ` Oliver Neukum
2016-07-26 17:59 ` [PATCH v2 11/22] usb: serial: ti_usb_3410_5052: Do not modify interrupt context Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 12/22] usb: serial: ti_usb_3410_5052: Remove usb_serial pointer in ti_port Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 13/22] usb: serial: ti_usb_3410_5052: Change ti_get/set_serial_info function arguments Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 14/22] usb: serial: ti_usb_3410_5052: Do not set shadow mcr in open callback Mathieu OTHACEHE
2016-07-26 17:59 ` Mathieu OTHACEHE [this message]
2016-07-26 17:59 ` [PATCH v2 16/22] usb: serial: ti_usb_3410_5052: Raise DTR and RTS flags if speed is not null anymore Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 17/22] usb: serial: ti_usb_3410_5052: Fix firmware downloading Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 18/22] usb: serial: ti_usb_3410_5052: Standardize debug and error messages Mathieu OTHACEHE
2016-07-26 17:59 ` [PATCH v2 19/22] usb: serial: ti_usb_3410_5052: Use variables for vendor and product Mathieu OTHACEHE
2016-07-26 18:00 ` [PATCH v2 20/22] usb: serial: ti_usb_3410_5052: Set shadow msr before waking up waiters Mathieu OTHACEHE
2016-07-26 18:00 ` [PATCH v2 21/22] usb: serial: ti_usb_3410_5052: Add CMSPAR support Mathieu OTHACEHE
2016-07-26 18:00 ` [PATCH v2 22/22] usb: serial: ti_usb_3410_5052: Fix indentation problems Mathieu OTHACEHE
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