2018-06-17 02:31:43

by Dongjiu Geng

Subject: [PATCH v3] usb: xhci: remove the code build warning

Initialize the 'err' variate to remove the build warning,
the warning is shown as below:

drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here

Signed-off-by: Dongjiu Geng <[email protected]>
Acked-by: Thierry Reding <[email protected]>
---
change since v1:
1. Add 'Acked-by: Thierry Reding <[email protected]>'

How to reproduce:
1. make defconfig ARCH=arm
2. make -j100 CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm

Then you can see below warnings:
drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here
---
drivers/usb/host/xhci-tegra.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index a8c1d07..d50549f 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -481,7 +481,7 @@ static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra,
unsigned long mask;
unsigned int port;
bool idle, enable;
- int err;
+ int err = 0;

memset(&rsp, 0, sizeof(rsp));

--
1.9.1

2018-06-19 10:09:10

by Jon Hunter

Subject: Re: [PATCH v3] usb: xhci: remove the code build warning

On 17/06/18 03:30, Dongjiu Geng wrote:
> Initialize the 'err' variate to remove the build warning,
> the warning is shown as below:
>
> drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
> drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
> drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here
>
> Signed-off-by: Dongjiu Geng <[email protected]>
> Acked-by: Thierry Reding <[email protected]>
> ---
> change since v1:
> 1. Add 'Acked-by: Thierry Reding <[email protected]>'
>
> How to reproduce:
> 1. make defconfig ARCH=arm
> 2. make -j100 CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm
>
> Then you can see below warnings:
> drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
> drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
> drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here
> ---
> drivers/usb/host/xhci-tegra.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
> index a8c1d07..d50549f 100644
> --- a/drivers/usb/host/xhci-tegra.c
> +++ b/drivers/usb/host/xhci-tegra.c
> @@ -481,7 +481,7 @@ static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra,
> unsigned long mask;
> unsigned int port;
> bool idle, enable;
> - int err;
> + int err = 0;
>
> memset(&rsp, 0, sizeof(rsp));

Acked-by: Jon Hunter <[email protected]>

Cheers!
Jon

--
nvpublic