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serial: arc_uart: Use uart_circ_empty() for open-coded comparison

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Replace open-coded test for empty tx ring buffer with equivalent
helper function, uart_circ_empty(). No functional change.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2014-07-06 11:29:53 -04:00 committed by Greg Kroah-Hartman
parent c557d392fb
commit 99ecb001f5
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/arc_uart.c
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@ -177,7 +177,7 @@ static void arc_serial_tx_chars(struct arc_uart_port *uart)
uart->port.icount.tx++;
uart->port.x_char = 0;
sent = 1;
} else if (xmit->tail != xmit->head) { /* TODO: uart_circ_empty */
} else if (!uart_circ_empty(xmit)) {
ch = xmit->buf[xmit->tail];
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
uart->port.icount.tx++;