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authorPeter Hurley <peter@hurleysoftware.com>2015-01-22 12:24:26 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-02-02 10:11:27 -0800
commitd1f2f219319813070c022e841f48bfd0fe17fd34 (patch)
treea2f73cb32605312c8a828c2b7151958ddbafdbfd /drivers/tty
parent01ba8d6af4b76aee99a8ae3a76748c8c36db49f3 (diff)
downloadlinux-d1f2f219319813070c022e841f48bfd0fe17fd34.tar.bz2
serial: 8250: Move UART_BUG_QUOT workaround
The UART_BUG_QUOT workaround adjusts the divisor computed from the baud rate by serial8250_get_divisor(). Move the workaround into serial8250_get_divisor(), so that divisor-from-baud computation is encapsulated. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_core.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index df8a5aa96bc6..8e3302c6bbff 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -2413,8 +2413,9 @@ static void serial8250_shutdown(struct uart_port *port)
serial8250_do_shutdown(port);
}
-static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud)
+static unsigned int serial8250_get_divisor(struct uart_8250_port *up, unsigned int baud)
{
+ struct uart_port *port = &up->port;
unsigned int quot;
/*
@@ -2430,6 +2431,12 @@ static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int
else
quot = uart_get_divisor(port, baud);
+ /*
+ * Oxford Semi 952 rev B workaround
+ */
+ if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0)
+ quot++;
+
return quot;
}
@@ -2478,13 +2485,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
baud = uart_get_baud_rate(port, termios, old,
port->uartclk / 16 / 0xffff,
port->uartclk / 16);
- quot = serial8250_get_divisor(port, baud);
-
- /*
- * Oxford Semi 952 rev B workaround
- */
- if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0)
- quot++;
+ quot = serial8250_get_divisor(up, baud);
if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) {
/* NOTE: If fifo_bug is not set, a user can set RX_trigger. */