Commit 706bbc57 authored by Raviteja Narayanam's avatar Raviteja Narayanam Committed by Greg Kroah-Hartman
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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: default avatarRaviteja Narayanam <raviteja.narayanam@xilinx.com>
Signed-off-by: default avatarShubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Acked-by: default avatarMaarten Brock <m.brock@vanmierlo.com>
Link: https://lore.kernel.org/r/e2514818af5973be291cc117d07739f068b71639.1584610774.git.shubhrajyoti.datta@xilinx.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 97451855

drivers/tty/serial/xilinx_uartps.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

}



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