diff options
| author | Raviteja Narayanam <raviteja.narayanam@xilinx.com> | 2020-03-19 15:14:51 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-24 12:23:04 +0100 |
| commit | 706bbc572d5955272d4b67782a22083f8a6ad16a (patch) | |
| tree | be1b6ecefad9614a01213752a8eac880e8c5df8d /drivers/tty | |
| parent | 97451855cc3bb9ab0c222a44a66f068278ff6ccb (diff) | |
| download | linux-706bbc572d5955272d4b67782a22083f8a6ad16a.tar.bz2 | |
serial: uartps: Add TACTIVE check in cdns_uart_tx_empty function
Make sure that all bytes are transmitted out of Uart by monitoring
CDNS_UART_SR_TACTIVE bit as well.
Signed-off-by: Raviteja Narayanam <raviteja.narayanam@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Acked-by: Maarten Brock <m.brock@vanmierlo.com>
Link: https://lore.kernel.org/r/e2514818af5973be291cc117d07739f068b71639.1584610774.git.shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index f3658fc49029..6b26f767768e 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -650,8 +650,8 @@ static unsigned int cdns_uart_tx_empty(struct uart_port *port) unsigned int status; status = readl(port->membase + CDNS_UART_SR) & - CDNS_UART_SR_TXEMPTY; - return status ? TIOCSER_TEMT : 0; + (CDNS_UART_SR_TXEMPTY | CDNS_UART_SR_TACTIVE); + return (status == CDNS_UART_SR_TXEMPTY) ? TIOCSER_TEMT : 0; } /** |