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serial: uartps: Remove unconditional wait inside set_termios

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set_termios function should not wait for the transmit FIFO empty
(CDNS_UART_SR_TXEMPTY) unconditionally. The tty layer takes care
of it based on the parameter passed (TCSANOW/TCSADRAIN/TCSAFLUSH).

Signed-off-by: Raviteja Narayanam <raviteja.narayanam@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Link: https://lore.kernel.org/r/536e190dd5bbb474007a67e6323c048288942a28.1584610774.git.shubhrajyoti.datta@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Raviteja Narayanam 2020-03-19 15:14:50 +05:30 committed by Greg Kroah-Hartman
parent cbf580ff09
commit 97451855cc
1 changed files with 1 additions and 13 deletions
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14
drivers/tty/serial/xilinx_uartps.c
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@ -693,20 +693,8 @@ static void cdns_uart_set_termios(struct uart_port *port,
u32 cval = 0;
unsigned int baud, minbaud, maxbaud;
unsigned long flags;
unsigned int ctrl_reg, mode_reg, val;
int err;
unsigned int ctrl_reg, mode_reg;
/* Wait for the transmit FIFO to empty before making changes */
if (!(readl(port->membase + CDNS_UART_CR) &
CDNS_UART_CR_TX_DIS)) {
err = readl_poll_timeout(port->membase + CDNS_UART_SR,
val, (val & CDNS_UART_SR_TXEMPTY),
1000, TX_TIMEOUT);
if (err) {
dev_err(port->dev, "timed out waiting for tx empty");
return;
}
}
spin_lock_irqsave(&port->lock, flags);
/* Disable the TX and RX to set baud rate */