From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Update the SCIF serial driver to remove printouts for break, frame, parity
and overrun errors. This reduces the amount of console printouts generated
by the defconfig kernel on R-Car Gen3 for certain use cases. To retrieve
more information about such errors the user may inspect counters. Also these
errors are fed into the TTY layer for further application specific handling.
Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
---
Applies to v5.16-rc4
Previous version sent as:
[PATCH] serial: sh-sci: Use dev_dbg() for frame and parity errors
drivers/tty/serial/sh-sci.c | 12 ------------
1 file changed, 12 deletions(-)
--- 0001/drivers/tty/serial/sh-sci.c
+++ work/drivers/tty/serial/sh-sci.c 2021-12-07 10:37:45.974123374 +0900
@@ -895,11 +895,9 @@ static void sci_receive_chars(struct uar
if (status & SCxSR_FER(port)) {
flag = TTY_FRAME;
port->icount.frame++;
- dev_notice(port->dev, "frame error\n");
} else if (status & SCxSR_PER(port)) {
flag = TTY_PARITY;
port->icount.parity++;
- dev_notice(port->dev, "parity error\n");
} else
flag = TTY_NORMAL;
@@ -939,8 +937,6 @@ static int sci_handle_errors(struct uart
/* overrun error */
if (tty_insert_flip_char(tport, 0, TTY_OVERRUN))
copied++;
-
- dev_notice(port->dev, "overrun error\n");
}
if (status & SCxSR_FER(port)) {
@@ -949,8 +945,6 @@ static int sci_handle_errors(struct uart
if (tty_insert_flip_char(tport, 0, TTY_FRAME))
copied++;
-
- dev_notice(port->dev, "frame error\n");
}
if (status & SCxSR_PER(port)) {
@@ -959,8 +953,6 @@ static int sci_handle_errors(struct uart
if (tty_insert_flip_char(tport, 0, TTY_PARITY))
copied++;
-
- dev_notice(port->dev, "parity error\n");
}
if (copied)
@@ -990,8 +982,6 @@ static int sci_handle_fifo_overrun(struc
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
tty_flip_buffer_push(tport);
-
- dev_dbg(port->dev, "overrun error\n");
copied++;
}
@@ -1013,8 +1003,6 @@ static int sci_handle_breaks(struct uart
/* Notify of BREAK */
if (tty_insert_flip_char(tport, 0, TTY_BREAK))
copied++;
-
- dev_dbg(port->dev, "BREAK detected\n");
}
if (copied)
