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| author | Johan Hovold <johan@kernel.org> | 2017-06-06 12:54:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-13 11:49:58 +0200 |
| commit | f3e8ae657e40354cfb1372555f0d700f50f72ba2 (patch) | |
| tree | 782d01925dbffe9703c92ddc15058d91f857edb8 /drivers/usb/serial/ftdi_sio.c | |
| parent | dc2f7271593dacaf1ce3b0c57dc657c3221e841c (diff) | |
| download | linux-f3e8ae657e40354cfb1372555f0d700f50f72ba2.tar.gz linux-f3e8ae657e40354cfb1372555f0d700f50f72ba2.tar.bz2 linux-f3e8ae657e40354cfb1372555f0d700f50f72ba2.zip | |
USB: serial: ftdi_sio: simplify TIOCSSERIAL flag logic
Simplify TIOCSSERIAL flag logic somewhat.
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index aba74f817dc6..df5c45a4b1d7 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1505,8 +1505,7 @@ static int set_serial_info(struct tty_struct *tty, /* Do error checking and permission checking */ if (!capable(CAP_SYS_ADMIN)) { - if (((new_serial.flags & ~ASYNC_USR_MASK) != - (priv->flags & ~ASYNC_USR_MASK))) { + if ((new_serial.flags ^ priv->flags) & ~ASYNC_USR_MASK) { mutex_unlock(&priv->cfg_lock); return -EPERM; } @@ -1530,8 +1529,7 @@ static int set_serial_info(struct tty_struct *tty, check_and_exit: write_latency_timer(port); - if ((old_priv.flags & ASYNC_SPD_MASK) != - (priv->flags & ASYNC_SPD_MASK)) { + if ((priv->flags ^ old_priv.flags) & ASYNC_SPD_MASK) { if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) tty->alt_speed = 57600; else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) @@ -1543,10 +1541,9 @@ check_and_exit: else tty->alt_speed = 0; } - if (((old_priv.flags & ASYNC_SPD_MASK) != - (priv->flags & ASYNC_SPD_MASK)) || - (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && - (old_priv.custom_divisor != priv->custom_divisor))) { + if ((priv->flags ^ old_priv.flags) & ASYNC_SPD_MASK || + ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && + priv->custom_divisor != old_priv.custom_divisor)) { change_speed(tty, port); mutex_unlock(&priv->cfg_lock); } |