diff options
| author | Beomho Seo <beomho.seo@samsung.com> | 2018-12-14 12:34:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:44:55 +0100 |
| commit | 13d7112b4bca18c9bf507b00c150b6df043d754c (patch) | |
| tree | 17902f500e28e3a061a64456b712146b8d960980 | |
| parent | 4bde07d81d6680486af7d4136f0e19b20b8bd43e (diff) | |
| download | linux-stable-13d7112b4bca18c9bf507b00c150b6df043d754c.tar.gz linux-stable-13d7112b4bca18c9bf507b00c150b6df043d754c.tar.bz2 linux-stable-13d7112b4bca18c9bf507b00c150b6df043d754c.zip | |
tty: serial: samsung: Properly set flags in autoCTS mode
[ Upstream commit 31e933645742ee6719d37573a27cce0761dcf92b ]
Commit 391f93f2ec9f ("serial: core: Rework hw-assited flow control support")
has changed the way the autoCTS mode is handled.
According to that change, serial drivers which enable H/W autoCTS mode must
set UPSTAT_AUTOCTS to prevent the serial core from inadvertently disabling
TX. This patch adds proper handling of UPSTAT_AUTOCTS flag.
Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
[mszyprow: rephrased commit message]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/tty/serial/samsung.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 5609305b3676..01ff8ec78023 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1335,11 +1335,14 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, wr_regl(port, S3C2410_ULCON, ulcon); wr_regl(port, S3C2410_UBRDIV, quot); + port->status &= ~UPSTAT_AUTOCTS; + umcon = rd_regl(port, S3C2410_UMCON); if (termios->c_cflag & CRTSCTS) { umcon |= S3C2410_UMCOM_AFC; /* Disable RTS when RX FIFO contains 63 bytes */ umcon &= ~S3C2412_UMCON_AFC_8; + port->status = UPSTAT_AUTOCTS; } else { umcon &= ~S3C2410_UMCOM_AFC; } |