swh:1:snp:c2847dfd741eae21606027cf29250d1ebcd63fb4
Revision b1ffb4c851f185e9051ba837c16d9b84ef688d26 authored by Andrew Worsley on 18 November 2011, 12:13:33 UTC, committed by Greg Kroah-Hartman on 18 November 2011, 19:27:16 UTC
Fix for ftdi_set_termios() glitching output ftdi_set_termios() is constantly setting the baud rate, data bits and parity unnecessarily on every call, . When called while characters are being transmitted can cause the FTDI chip to corrupt the serial port bit stream output by stalling the output half a bit during the output of a character. Simple fix by skipping this setting if the baud rate/data bits/parity are unchanged. Signed-off-by: Andrew Worsley <amworsley@gmail.com> Cc: stable <stable@vger.kernel.org> ---- I had a brief run with strace on the getty and it was doing ioctl()s on each call but it didn't look relavant to the problem. I think the issue is that XON/XOFF flow control was being implmented via hardware - for the ixoff to allow the user to use XON/XOFF to control output. Unfortunately it would send 3 Control URBs updating all of the settings after each piece of input I am trying to work around the issue of gmail messing with the tab/spacing by submitting via SMTP via gmail which I believe should fix the issue. The patch is against v3.2-rc2 and compiles - but no additional testing in this kernel has been done. Thanks Andrew Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 parent 4aa3648
Tip revision: 53d5fc89d66a778577295020dc57bb3ccec84354 authored by Linus Torvalds on 01 October 2021, 21:45:23 UTC
Merge tag 's390-5.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Merge tag 's390-5.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Tip revision: 53d5fc8
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arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 1014 bytes |
.mailmap | -rw-r--r-- | 4.1 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 92.6 KB |
Kbuild | -rw-r--r-- | 2.5 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 201.2 KB |
Makefile | -rw-r--r-- | 52.2 KB |
README | -rw-r--r-- | 17.0 KB |
REPORTING-BUGS | -rw-r--r-- | 3.3 KB |
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