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From: Johan Hovold <johan@kernel.org>
To: linux-usb@vger.kernel.org
Cc: Johan Hovold <johan@kernel.org>
Subject: [PATCH 04/10] USB: serial: only set sysrq timestamp for consoles
Date: Wed,  8 Jul 2020 14:49:54 +0200	[thread overview]
Message-ID: <20200708125000.15659-5-johan@kernel.org> (raw)
In-Reply-To: <20200708125000.15659-1-johan@kernel.org>

Only set the sysrq timestamp for console ports to avoid having every
driver also check the console flag when processing incoming data.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/f81232.c   |  4 ++--
 drivers/usb/serial/f81534.c   |  2 +-
 drivers/usb/serial/ftdi_sio.c |  2 +-
 drivers/usb/serial/generic.c  | 11 +++++++----
 drivers/usb/serial/mxuport.c  |  6 +++---
 drivers/usb/serial/pl2303.c   |  2 +-
 drivers/usb/serial/ssu100.c   |  5 +++--
 7 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index dcda7fb164b4..0c7eacc630e0 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -424,7 +424,7 @@ static void f81232_process_read_urb(struct urb *urb)
 		lsr = data[i];
 		tty_flag = f81232_handle_lsr(port, lsr);
 
-		if (port->port.console && port->sysrq) {
+		if (port->sysrq) {
 			if (usb_serial_handle_sysrq_char(port, data[i + 1]))
 				continue;
 		}
@@ -461,7 +461,7 @@ static void f81534a_process_read_urb(struct urb *urb)
 	lsr = data[len - 1];
 	tty_flag = f81232_handle_lsr(port, lsr);
 
-	if (port->port.console && port->sysrq) {
+	if (port->sysrq) {
 		for (i = 1; i < len - 1; ++i) {
 			if (!usb_serial_handle_sysrq_char(port, data[i])) {
 				tty_insert_flip_char(&port->port, data[i],
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c
index 2b39bda035c7..5661fd03e545 100644
--- a/drivers/usb/serial/f81534.c
+++ b/drivers/usb/serial/f81534.c
@@ -1238,7 +1238,7 @@ static void f81534_process_per_serial_block(struct usb_serial_port *port,
 			schedule_work(&port_priv->lsr_work);
 		}
 
-		if (port->port.console && port->sysrq) {
+		if (port->sysrq) {
 			if (usb_serial_handle_sysrq_char(port, data[i]))
 				continue;
 		}
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 07b146d7033a..ade68405b015 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -2561,7 +2561,7 @@ static int ftdi_process_packet(struct usb_serial_port *port,
 
 	port->icount.rx += len - 2;
 
-	if (brkint || (port->port.console && port->sysrq)) {
+	if (brkint || port->sysrq) {
 		for (i = 2; i < len; i++) {
 			if (brkint && i == len - 1) {
 				if (usb_serial_handle_break(port))
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 5cdf180cda23..05a2a3aa3963 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -355,13 +355,13 @@ void usb_serial_generic_process_read_urb(struct urb *urb)
 	 * stuff like 3G modems, so shortcircuit it in the 99.9999999% of
 	 * cases where the USB serial is not a console anyway.
 	 */
-	if (!port->port.console || !port->sysrq) {
-		tty_insert_flip_string(&port->port, ch, urb->actual_length);
-	} else {
+	if (port->sysrq) {
 		for (i = 0; i < urb->actual_length; i++, ch++) {
 			if (!usb_serial_handle_sysrq_char(port, *ch))
 				tty_insert_flip_char(&port->port, *ch, TTY_NORMAL);
 		}
+	} else {
+		tty_insert_flip_string(&port->port, ch, urb->actual_length);
 	}
 	tty_flip_buffer_push(&port->port);
 }
@@ -574,7 +574,7 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_get_icount);
 #ifdef CONFIG_MAGIC_SYSRQ
 int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)
 {
-	if (port->sysrq && port->port.console) {
+	if (port->sysrq) {
 		if (ch && time_before(jiffies, port->sysrq)) {
 			handle_sysrq(ch);
 			port->sysrq = 0;
@@ -594,6 +594,9 @@ EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char);
 
 int usb_serial_handle_break(struct usb_serial_port *port)
 {
+	if (!port->port.console)
+		return 0;
+
 	if (!port->sysrq) {
 		port->sysrq = jiffies + HZ*5;
 		return 1;
diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
index 2513ee902779..5d38c2a0f590 100644
--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -327,14 +327,14 @@ static void mxuport_process_read_urb_data(struct usb_serial_port *port,
 {
 	int i;
 
-	if (!port->port.console || !port->sysrq) {
-		tty_insert_flip_string(&port->port, data, size);
-	} else {
+	if (port->sysrq) {
 		for (i = 0; i < size; i++, data++) {
 			if (!usb_serial_handle_sysrq_char(port, *data))
 				tty_insert_flip_char(&port->port, *data,
 						     TTY_NORMAL);
 		}
+	} else {
+		tty_insert_flip_string(&port->port, data, size);
 	}
 	tty_flip_buffer_push(&port->port);
 }
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index c5a2995dfa2e..048452d8a4a4 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -1101,7 +1101,7 @@ static void pl2303_process_read_urb(struct urb *urb)
 	if (line_status & UART_OVERRUN_ERROR)
 		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
 
-	if (port->port.console && port->sysrq) {
+	if (port->sysrq) {
 		for (i = 0; i < urb->actual_length; ++i)
 			if (!usb_serial_handle_sysrq_char(port, data[i]))
 				tty_insert_flip_char(&port->port, data[i],
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index f6aea9f1be1a..01472b96bf38 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -517,13 +517,14 @@ static void ssu100_process_read_urb(struct urb *urb)
 	if (!len)
 		return;	/* status only */
 
-	if (port->port.console && port->sysrq) {
+	if (port->sysrq) {
 		for (i = 0; i < len; i++, ch++) {
 			if (!usb_serial_handle_sysrq_char(port, *ch))
 				tty_insert_flip_char(&port->port, *ch, flag);
 		}
-	} else
+	} else {
 		tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
+	}
 
 	tty_flip_buffer_push(&port->port);
 }
-- 
2.26.2


  parent reply	other threads:[~2020-07-08 12:50 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-08 12:49 [PATCH 00/10] USB: serial: break and sysrq fixes and cleanups Johan Hovold
2020-07-08 12:49 ` [PATCH 01/10] USB: serial: ftdi_sio: make process-packet buffer unsigned Johan Hovold
2020-07-08 12:49 ` [PATCH 02/10] USB: serial: ftdi_sio: clean up receive processing Johan Hovold
2020-07-08 12:49 ` [PATCH 03/10] USB: serial: ftdi_sio: fix break and sysrq handling Johan Hovold
2020-07-08 12:49 ` Johan Hovold [this message]
2020-07-08 12:49 ` [PATCH 05/10] USB: serial: only process sysrq when enabled Johan Hovold
2020-07-08 12:49 ` [PATCH 06/10] USB: serial: inline sysrq dummy function Johan Hovold
2020-07-08 12:49 ` [PATCH 07/10] USB: serial: add sysrq break-handler dummy Johan Hovold
2020-07-08 12:49 ` [PATCH 08/10] USB: serial: drop unnecessary sysrq include Johan Hovold
2020-07-08 12:49 ` [PATCH 09/10] USB: serial: drop extern keyword from function declarations Johan Hovold
2020-07-08 12:50 ` [PATCH 10/10] USB: serial: drop redundant transfer-buffer casts Johan Hovold
2020-07-08 15:45 ` [PATCH 00/10] USB: serial: break and sysrq fixes and cleanups Greg KH
2020-07-09  7:23   ` Johan Hovold

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