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| author | Frank Schaefer <schaefer.frank@gmx.net> | 2009-08-18 20:34:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-23 06:46:37 -0700 |
| commit | 29cf1b72f34519413b3fafbccc9ac776eb948ede (patch) | |
| tree | 2b49aeb7efddd3263fb8329fe3f8f469eff56025 | |
| parent | 6dd81b45fd7628f3eb308f387aee696366718f25 (diff) | |
| download | blackbird-op-linux-29cf1b72f34519413b3fafbccc9ac776eb948ede.tar.gz blackbird-op-linux-29cf1b72f34519413b3fafbccc9ac776eb948ede.zip | |
USB-serial: pl2303: use 1.5 instead of 2 stop bits with 5 data bits
This is how "real" UARTs (e.g. 16550) work and AFAIK what RS232 specifies, too.
Make the driver more compliant.
Signed-off-by: Frank Schaefer <schaefer.frank@gmx.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 6ed33c7e53e2..1128e01525b1 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -622,8 +622,16 @@ static void pl2303_set_termios(struct tty_struct *tty, /* For reference buf[4]=1 is 1.5 stop bits */ /* For reference buf[4]=2 is 2 stop bits */ if (cflag & CSTOPB) { - buf[4] = 2; - dbg("%s - stop bits = 2", __func__); + /* NOTE: Comply with "real" UARTs / RS232: + * use 1.5 instead of 2 stop bits with 5 data bits + */ + if ((cflag & CSIZE) == CS5) { + buf[4] = 1; + dbg("%s - stop bits = 1.5", __func__); + } else { + buf[4] = 2; + dbg("%s - stop bits = 2", __func__); + } } else { buf[4] = 0; dbg("%s - stop bits = 1", __func__); |
