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Serial tty is hung after reset command - $echo "test " >> /dev/ttyS0 test $stty -a < /dev/ttyS0 speed 115200 baud; rows 34; columns 153; line = 0; intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0; -parenb -parodd -cmspar cs8 hupcl -cstopb cread clocal -crtscts -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon ixoff -iuclc -ixany -imaxbel iutf8 opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 isig icanon -iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke -flusho -extproc $reset $echo "test " >> /dev/ttyS0 ^C $stty -a < /dev/ttyS0 ^C Updating reset_tty_settings API with latest code which fixes tty hung issue (From OE-Core rev: 2419afd8024f903efff862f3f7f7772aedea7613) Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>