From: Johan Hovold <johan@kernel.org>
To: Johan Hovold <johan@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Subject: [PATCH 2/2] USB: serial: whiteheat: fix line-speed endianness
Date: Tue, 29 Oct 2019 11:23:54 +0100 [thread overview]
Message-ID: <20191029102354.2733-3-johan@kernel.org> (raw)
In-Reply-To: <20191029102354.2733-1-johan@kernel.org>
Add missing endianness conversion when setting the line speed so that
this driver might work also on big-endian machines.
Also use an unsigned format specifier in the corresponding debug
message.
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/usb/serial/whiteheat.c | 9 ++++++---
drivers/usb/serial/whiteheat.h | 2 +-
2 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 76cabcb30d21..ca3bd58f2025 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -636,6 +636,7 @@ static void firm_setup_port(struct tty_struct *tty)
struct device *dev = &port->dev;
struct whiteheat_port_settings port_settings;
unsigned int cflag = tty->termios.c_cflag;
+ speed_t baud;
port_settings.port = port->port_number + 1;
@@ -696,11 +697,13 @@ static void firm_setup_port(struct tty_struct *tty)
dev_dbg(dev, "%s - XON = %2x, XOFF = %2x\n", __func__, port_settings.xon, port_settings.xoff);
/* get the baud rate wanted */
- port_settings.baud = tty_get_baud_rate(tty);
- dev_dbg(dev, "%s - baud rate = %d\n", __func__, port_settings.baud);
+ baud = tty_get_baud_rate(tty);
+ port_settings.baud = cpu_to_le32(baud);
+ dev_dbg(dev, "%s - baud rate = %u\n", __func__, baud);
/* fixme: should set validated settings */
- tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud);
+ tty_encode_baud_rate(tty, baud, baud);
+
/* handle any settings that aren't specified in the tty structure */
port_settings.lloop = 0;
diff --git a/drivers/usb/serial/whiteheat.h b/drivers/usb/serial/whiteheat.h
index 00398149cd8d..269e727a92f9 100644
--- a/drivers/usb/serial/whiteheat.h
+++ b/drivers/usb/serial/whiteheat.h
@@ -87,7 +87,7 @@ struct whiteheat_simple {
struct whiteheat_port_settings {
__u8 port; /* port number (1 to N) */
- __u32 baud; /* any value 7 - 460800, firmware calculates
+ __le32 baud; /* any value 7 - 460800, firmware calculates
best fit; arrives little endian */
__u8 bits; /* 5, 6, 7, or 8 */
__u8 stop; /* 1 or 2, default 1 (2 = 1.5 if bits = 5) */
--
2.23.0
prev parent reply other threads:[~2019-10-29 10:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 10:23 [PATCH 0/2] USB: serial: whiteheat: fix slab corruption and endianness bug Johan Hovold
2019-10-29 10:23 ` [PATCH 1/2] USB: serial: whiteheat: fix potential slab corruption Johan Hovold
2019-10-29 10:23 ` Johan Hovold [this message]
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