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serial: zs: Fix swapped RI/DSR modem line transition counting

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Fix a thinko in the status interrupt handler that has caused counters
for the RI and DSR modem line transitions to be used for the other line
each.

Fixes: 8b4a40809e ("zs: move to the serial subsystem")
Cc: stable <stable@kernel.org>
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://patch.msgid.link/alpine.DEB.2.21.2604101747110.29980@angie.orcam.me.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maciej W. Rozycki 2026-04-10 18:19:31 +01:00 committed by Greg Kroah-Hartman
parent 254f49634e
commit d15cd40cb1
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/zs.c
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@ -680,9 +680,9 @@ static void zs_status_handle(struct zs_port *zport, struct zs_port *zport_a)
uart_handle_dcd_change(uport,
zport->mctrl & TIOCM_CAR);
if (delta & TIOCM_RNG)
uport->icount.dsr++;
if (delta & TIOCM_DSR)
uport->icount.rng++;
if (delta & TIOCM_DSR)
uport->icount.dsr++;
if (delta)
wake_up_interruptible(&uport->state->port.delta_msr_wait);