Change in flashrom[1.0.x]: Fix serprog on FreeBSD

[Nico Huber (Code Review)]

Hello Urja Rannikko, build bot (Jenkins),

I'd like you to do a code review. Please visit

https://review.coreboot.org/22334

to review the following change.

Change subject: Fix serprog on FreeBSD
......................................................................

Fix serprog on FreeBSD

Using serprog on FreeBSD to read an SPI flash (MX25L6406) via an
Arduino Nano V3 with flashrom hangs after 5 seconds while reading. The
problem is that kernel method "ttydisc_rint" ignores some bytes. It
happens due to enabled IEXTEN local flag of termios. TTY cuts a few
bytes, Arduino reads 11264 bytes, but flashrom gets only 11244 bytes
and waits for the remaining 20 bytes.

The fix is simple: turn off the IEXTEN local flag.

Tested on Arduino Nano V3 + FreeBSD 12-CURRENT.

Change-Id: I7aa6a283d523c544d9b8923cd4c622bf08c0fb3f
Signed-off-by: Michael Zhilin 
Reviewed-on: https://review.coreboot.org/21919
Reviewed-by: Nico Huber 
Reviewed-by: Urja Rannikko 
Tested-by: build bot (Jenkins) 
---
M serial.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/34/22334/1

diff --git a/serial.c b/serial.c
index a64a51d..1b14fb5 100644
--- a/serial.c
+++ b/serial.c
@@ -203,7 +203,7 @@
    }
    wanted.c_cflag &= ~(PARENB | CSTOPB | CSIZE | CRTSCTS);
    wanted.c_cflag |= (CS8 | CLOCAL | CREAD);
-	wanted.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+	wanted.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG | IEXTEN);
    wanted.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL | IGNCR | INLCR);
    wanted.c_oflag &= ~OPOST;
    if (tcsetattr(fd, TCSANOW, &wanted) != 0) {