diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-06-18 08:15:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-18 13:10:02 +0200 |
| commit | 007bbdc87522d17d711ca6bef0d4fe85f62f8c84 (patch) | |
| tree | 6b1a380f0b5fbd48428a72428fa0a448e22c5e5e /drivers/tty/mxser.c | |
| parent | mxser: cleanup mxser_rs_break (diff) | |
| download | linux-007bbdc87522d17d711ca6bef0d4fe85f62f8c84.tar.xz linux-007bbdc87522d17d711ca6bef0d4fe85f62f8c84.zip | |
mxser: cleanup mxser_dtr_rts
mxser_dtr_rts now does all inb, outb, & or | in a single statement. The
code is hard to follow, so make it more readable by doing one-line =
one-statement.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210618061516.662-57-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/mxser.c')
| -rw-r--r-- | drivers/tty/mxser.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 5789c4343f10..daf820c086f4 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -428,14 +428,15 @@ static void mxser_dtr_rts(struct tty_port *port, int on) { struct mxser_port *mp = container_of(port, struct mxser_port, port); unsigned long flags; + u8 mcr; spin_lock_irqsave(&mp->slock, flags); + mcr = inb(mp->ioaddr + UART_MCR); if (on) - outb(inb(mp->ioaddr + UART_MCR) | - UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); + mcr |= UART_MCR_DTR | UART_MCR_RTS; else - outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), - mp->ioaddr + UART_MCR); + mcr &= ~(UART_MCR_DTR | UART_MCR_RTS); + outb(mcr, mp->ioaddr + UART_MCR); spin_unlock_irqrestore(&mp->slock, flags); } |