From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: [PATCH] tty: serial: qcom_geni_serial: Initialize baud in qcom_geni_console_setup Date: Fri, 22 Mar 2019 15:20:28 +0100 Message-ID: References: <20190308084022.GA31474@kroah.com> <20190308183743.11145-1-natechancellor@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <20190308183743.11145-1-natechancellor@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Nathan Chancellor Cc: Andy Gross , David Brown , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Linux Kernel Mailing List , Nick Desaulniers , clang-built-linux@googlegroups.com List-Id: linux-arm-msm@vger.kernel.org On Fri, Mar 8, 2019 at 7:38 PM Nathan Chancellor wrote: > > When building with -Wsometimes-uninitialized, Clang warns: > > drivers/tty/serial/qcom_geni_serial.c:1079:6: warning: variable 'baud' > is used uninitialized whenever 'if' condition is false > [-Wsometimes-uninitialized] > > It's not wrong; when options is NULL, baud has no default value. Use > 9600 as that is a sane default. > > Link: https://github.com/ClangBuiltLinux/linux/issues/395 > Suggested-by: Greg Kroah-Hartman > Signed-off-by: Nathan Chancellor > --- > drivers/tty/serial/qcom_geni_serial.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c > index 3bcec1c20219..35e5f9c5d5be 100644 > --- a/drivers/tty/serial/qcom_geni_serial.c > +++ b/drivers/tty/serial/qcom_geni_serial.c > @@ -1050,7 +1050,7 @@ static int __init qcom_geni_console_setup(struct console *co, char *options) > { > struct uart_port *uport; > struct qcom_geni_serial_port *port; > - int baud; > + int baud = 9600; > int bits = 8; > int parity = 'n'; > int flow = 'n'; I made a similar patch here, but after looking at the driver concluded that the bitrate had to be 115200, since that is used as the default value otherwise. Arnd