tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode
authorNicolas Ferre <nicolas.ferre@microchip.com>
Mon, 10 Feb 2020 15:20:53 +0000 (16:20 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 28 Feb 2020 15:38:48 +0000 (16:38 +0100)
commit6807593e8edc51e481cbf598a8113245be262e25
treed72f69326309d18a4c87e4b4e5dd266370858b00
parentf4e6d51f3f40c6d7da963c77a4bfb831c81fde51
tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode

commit 04b5bfe3dc94e64d0590c54045815cb5183fb095 upstream.

In atmel_shutdown() we call atmel_stop_rx() and atmel_stop_tx() functions.
Prevent the rx restart that is implemented in RS485 or ISO7816 modes when
calling atmel_stop_tx() by using the atomic information tasklet_shutdown
that is already in place for this purpose.

Fixes: 98f2082c3ac4 ("tty/serial: atmel: enforce tasklet init and termination sequences")
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200210152053.8289-1-nicolas.ferre@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/atmel_serial.c