Hey, On 28/10/15 13:33, Oliver Neukum wrote: >> Sven, please test Oliver's patch on that tree. > It can be found at > https://kernel.googlesource.com/pub/scm/linux/kernel/git/gregkh/tty/ I finally got around to test this; sorry for the delay. I cloned that tree (git describe said v4.3-rc5), and applied Oliver's patch. With that kernel booted, the error occured much less frequently, but was still reproducable under load. With 4.2.5, I get a failure after a few hundred MB; with 4.3-rc5 plus patch, it transferred serveral gigabytes without errors, but failed when I started compiling something in the background as a test. So, I guess, this improves things but there's still no guarantee that the data sent by the device will actually be delivered. Querying for the stty options while the program is running gives this: # sudo stty -a -F /dev/ttyACM0 speed 9600 baud; rows 0; columns 0; 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 = 0; 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 -extproc If there's anything else which would be helpful for you to have tested, please let me know. Best regards, Sven
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