Hello:
This patch was applied to netdev/net.git (main)
by Dave Miller [off-list ref]:
On Tue, 27 Oct 2026 11:10:55 -0600 you wrote:
DTR/RTS changes are sent from a work item that only sends the latest
state, so a drop followed quickly by a raise, for example TIOCMBIC then
TIOCMBIS or a quick close and reopen, can reach the modem as just the
raise. A drop matters on its own, a modem set to AT&D2 hangs up on it.
Flush the work when DTR goes low so the drop is sent before ->dtr_rts()
returns, and flush it in stop() so any pending state is sent before the
channel is stopped. A drop that hits a full UL ring is still retried
with whatever state is latest by then.
[...]
Here is the summary with links:
- [net,v2] net: wwan: mhi_wwan_ctrl: send a DTR drop before it can be coalesced
https://git.kernel.org/netdev/net/c/10f51f4fb99d
You are awesome, thank you!
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