tty: serial: lpuart: disable flow control while waiting for the transmit engine to complete

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commit d5a2e08343 upstream.

When the user initializes the uart port, and waits for the transmit
engine to complete in lpuart32_set_termios(), if the UART TX fifo has
dirty data and the UARTMODIR enable the flow control, the TX fifo may
never be empty. So here we should disable the flow control first to make
sure the transmit engin can complete.

Fixes: 380c966c09 ("tty: serial: fsl_lpuart: add 32-bit register interface support")
Cc: stable <stable@kernel.org>
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20220821101527.10066-1-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sherry Sun 2022-08-21 18:15:27 +08:00 • committed by Greg Kroah-Hartman

parent 6f130dffc3

commit 3e05af2f82

1 changed files with 1 additions and 0 deletions

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drivers/tty/serial/fsl_lpuart.c

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