From: "Pali Rohár" <pali@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] tty: baudrate: Explicit usage of B0 for encoding input baudrate
Date: Mon, 27 Sep 2021 15:35:16 +0200 [thread overview]
Message-ID: <20210927133516.8671-1-pali@kernel.org> (raw)
Function tty_termios_input_baud_rate() checks IBSHIFT & CBAUD against B0
constant to determinate if input speed equals to output speed. So do same
B0 check also in tty_termios_encode_baud_rate() function to make these two
functions compatible.
Currently macro B0 is defined to 0 so there is no functional change.
This change just make code more explicit to show that Bnnn constants are
stored in CBAUD.
Signed-off-by: Pali Rohár <pali@kernel.org>
---
drivers/tty/tty_baudrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index 426b1252781a..d903e111dbcb 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -154,7 +154,7 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
termios->c_ospeed = obaud;
#ifdef IBSHIFT
- if ((termios->c_cflag >> IBSHIFT) & CBAUD)
+ if (((termios->c_cflag >> IBSHIFT) & CBAUD) != B0)
ibinput = 1; /* An input speed was specified */
#endif
#ifdef BOTHER
--
2.20.1
reply other threads:[~2021-09-27 13:36 UTC|newest]
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