Commit 557aaa7ffab6 ("ft232: support the ASYNC_LOW_LATENCY
flag") enables unprivileged users to set the FTDI latency timer,
but there was a logic flaw that skipped sending the corresponding
USB control message to the device.
Signed-off-by: Anthony Mallet <anthony.mal...@laas.fr>
---
Here is the patch, feel free to update the message and/or replace the
Signed-off-by if you like.
Best,
Anthony
--- drivers/usb/serial/ftdi_sio.c~ 2017-04-28 11:20:30.339227000 +0200
+++ drivers/usb/serial/ftdi_sio.c 2017-04-28 11:20:52.647773000 +0200
@@ -1505,9 +1505,9 @@ static int set_serial_info(struct tty_st
(new_serial.flags & ASYNC_FLAGS));
priv->custom_divisor = new_serial.custom_divisor;
+check_and_exit:
write_latency_timer(port);
-check_and_exit:
if ((old_priv.flags & ASYNC_SPD_MASK) !=
(priv->flags & ASYNC_SPD_MASK)) {
if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
--
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