https://github.com/torvalds/linux
Revision 63a8eef70ccb5199534dec56fed9759d214bfe55 authored by Johan Hovold on 09 June 2021, 16:15:09 UTC, committed by Johan Hovold on 10 June 2021, 14:59:00 UTC
CP2102N revision A01 (firmware version <= 1.0.4) has a buggy flow-control implementation that uses the ulXonLimit instead of ulFlowReplace field of the flow-control settings structure (erratum CP2102N_E104). A recent change that set the input software flow-control limits incidentally broke RTS control for these devices when CRTSCTS is not set as the new limits would always enable hardware flow control. Fix this by explicitly disabling flow control for the buggy firmware versions and only updating the input software flow-control limits when IXOFF is requested. This makes sure that the terminal settings matches the default zero ulXonLimit (ulFlowReplace) for these devices. Link: https://lore.kernel.org/r/20210609161509.9459-1-johan@kernel.org Reported-by: David Frey <dpfrey@gmail.com> Reported-by: Alex Villacís Lasso <a_villacis@palosanto.com> Tested-by: Alex Villacís Lasso <a_villacis@palosanto.com> Fixes: f61309d9c96a ("USB: serial: cp210x: set IXOFF thresholds") Cc: stable@vger.kernel.org # 5.12 Signed-off-by: Johan Hovold <johan@kernel.org>
1 parent 6f7ec77
Tip revision: 63a8eef70ccb5199534dec56fed9759d214bfe55 authored by Johan Hovold on 09 June 2021, 16:15:09 UTC
USB: serial: cp210x: fix CP2102N-A01 modem control
USB: serial: cp210x: fix CP2102N-A01 modem control
Tip revision: 63a8eef
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MAINTAINERS | -rw-r--r-- | 587.9 KB |
Makefile | -rw-r--r-- | 64.2 KB |
README | -rw-r--r-- | 727 bytes |
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