tree 58069b944527ccf355928c816284ac8253aa7a07
parent 774412bd40594620e9cbca90465eb477c4e3f09e
author Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> 1656342472 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1658430573 +0200

serial: stm32: Clear prev values before setting RTS delays

commit 5c5f44e36217de5ead789ff25da71c31c2331c96 upstream.

The code lacks clearing of previous DEAT/DEDT values. Thus, changing
values on the fly results in garbage delays tending towards the maximum
value as more and more bits are ORed together. (Leaving RS485 mode
would have cleared the old values though).

Fixes: 1bcda09d2910 ("serial: stm32: add support for RS485 hardware control mode")
Cc: stable <stable@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220627150753.34510-1-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>