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H A D | stm32-usart.c | diff 3e3578ca1b877a49a7521e600d51658d6d794267 Fri Feb 16 16:47:07 CST 2024 Lino Sanfilippo <l.sanfilippo@kunbus.com> serial: stm32: do not always set SER_RS485_RX_DURING_TX if RS485 is enabled
commit f418ae73311deb901c0110b08d1bbafc20c1820e upstream.
Before commit 07c30ea5861f ("serial: Do not hold the port lock when setting rx-during-tx GPIO") the SER_RS485_RX_DURING_TX flag was only set if the rx-during-tx mode was not controlled by a GPIO. Now the flag is set unconditionally when RS485 is enabled. This results in an incorrect setting if the rx-during-tx GPIO is not asserted.
Fix this by setting the flag only if the rx-during-tx mode is not controlled by a GPIO and thus restore the correct behaviour.
Cc: stable@vger.kernel.org # 6.6+ Fixes: 07c30ea5861f ("serial: Do not hold the port lock when setting rx-during-tx GPIO") Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com> Link: https://lore.kernel.org/r/20240216224709.9928-1-l.sanfilippo@kunbus.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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