linux-kernel - [PATCH 5.19 1019/1157] tty: serial: qcom-geni-serial: Fix %lu -> %u in print statements

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Message-Id: <20220815180520.663487574@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:06:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Douglas Anderson <dianders@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 1019/1157] tty: serial: qcom-geni-serial: Fix %lu -> %u in print statements

From: Douglas Anderson <dianders@...omium.org>

[ Upstream commit 0fec518018cc5ceffa706370b6e3acbbb1e3c798 ]

When we multiply an unsigned int by a u32 we still end up with an
unsigned int. That means we should specify "%u" not "%lu" in the
format code.

NOTE: this fix was chosen instead of somehow promoting the value to
"unsigned long" since the max baud rate from the earlier call to
uart_get_baud_rate() is 4000000 and the max sampling rate is 32.
4000000 * 32 = 0x07a12000, not even close to overflowing 32-bits.

Fixes: c474c775716e ("tty: serial: qcom-geni-serial: Fix get_clk_div_rate() which otherwise could return a sub-optimal clock rate.")
Reported-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Douglas Anderson <dianders@...omium.org>
Link: https://lore.kernel.org/r/20220802132250.1.Iea061e14157a17e114dbe2eca764568a02d6b889@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tty/serial/qcom_geni_serial.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index f754619451dc..f7c1f1807040 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1033,12 +1033,12 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
 		sampling_rate, &clk_div);
 	if (!clk_rate) {
 		dev_err(port->se.dev,
-			"Couldn't find suitable clock rate for %lu\n",
+			"Couldn't find suitable clock rate for %u\n",
 			baud * sampling_rate);
 		goto out_restart_rx;
 	}
 
-	dev_dbg(port->se.dev, "desired_rate-%lu, clk_rate-%lu, clk_div-%u\n",
+	dev_dbg(port->se.dev, "desired_rate-%u, clk_rate-%lu, clk_div-%u\n",
 			baud * sampling_rate, clk_rate, clk_div);
 
 	uport->uartclk = clk_rate;
-- 
2.35.1