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| author | Johan Hovold <johan@kernel.org> | 2017-01-06 19:15:17 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2017-01-16 12:30:45 +0100 |
| commit | a0467a967f347842b30739aae636c44980265265 (patch) | |
| tree | 43f5fa7489be7b63961e1fe03280f495caf87fd7 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 56e6d90797b4d8300e617a4f7b6ac216cf248041 (diff) | |
USB: serial: ch341: fix modem-status handling
The modem-status register was read as part of device configuration at
port_probe and then again at open (and reset-resume). During open (and
reset-resume) the MSR was read before submitting the interrupt URB,
something which could lead to an MSR-change going unnoticed when it
races with open (reset-resume).
Fix this by dropping the redundant reconfiguration of the port at every
open, and only read the MSR after the interrupt URB has been submitted.
Fixes: 664d5df92e88 ("USB: usb-serial ch341: support for DTR/RTS/CTS")
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions