diff options
| author | Matt Schulte <matts@commtech-fastcom.com> | 2012-11-20 17:23:56 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-22 00:28:04 (GMT) |
| commit | b7a7e14f654c80dfd3aa514adee663c74cfa4be9 (patch) | |
| tree | 983d14ed2ec9e5e6bcf8b56e2438d064ab573e18 /drivers/tty | |
| parent | d02f81555362e0032080af62154dca00d5ec99e0 (diff) | |
| download | linux-fsl-qoriq-b7a7e14f654c80dfd3aa514adee663c74cfa4be9.tar.xz | |
serial: Optimization: check for presence of UPF_EXAR_EFR flag before serial_in
Optimization: check for presence of UPF_EXAR_EFR flag before serial_in
Signed-off-by: Matt Schulte <matts@commtech-fastcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 3624df6..39d9707 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -911,9 +911,9 @@ static void autoconfig_16550a(struct uart_8250_port *up) * found at offset 0x09. Instead check the Deice ID (DVID) * register for a 2, 4 or 8 port UART. */ - status1 = serial_in(up, UART_EXAR_DVID); - if (status1 == 0x82 || status1 == 0x84 || status1 == 0x88) { - if (up->port.flags & UPF_EXAR_EFR) { + if (up->port.flags & UPF_EXAR_EFR) { + status1 = serial_in(up, UART_EXAR_DVID); + if (status1 == 0x82 || status1 == 0x84 || status1 == 0x88) { DEBUG_AUTOCONF("Exar XR17V35x "); up->port.type = PORT_XR17V35X; up->capabilities |= UART_CAP_AFE | UART_CAP_EFR | |