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| author |   Nicolas Ferre <nicolas.ferre@microchip.com> | 2020-02-10 16:20:53 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-10 12:26:44 -0800 |
| commit | 04b5bfe3dc94e64d0590c54045815cb5183fb095 (patch) | |
| tree | 0f1dc0bb72789c1431a42281e63b0185b0560df7 /drivers/tty | |
| parent | serdev: ttyport: restore client ops on deregistration (diff) | |
| download | linux-dev-04b5bfe3dc94e64d0590c54045815cb5183fb095.tar.xz linux-dev-04b5bfe3dc94e64d0590c54045815cb5183fb095.zip | |
tty/serial: atmel: manage shutdown in case of RS485 or ISO7816 mode
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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index c15c398c88a9..a39c87a7c2e1 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -570,7 +570,8 @@ static void atmel_stop_tx(struct uart_port *port) atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask); if (atmel_uart_is_half_duplex(port)) - atmel_start_rx(port); + if (!atomic_read(&atmel_port->tasklet_shutdown)) + atmel_start_rx(port); } |