linux-kernel - Re: [PATCH -mm] sisusbvga: Fix bug and build warnings

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Date:	Sun, 2 Sep 2007 22:11:38 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Satyam Sharma" <satyam@...radead.org>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Thomas Winischhofer" <thomas@...ischhofer.net>,
	"Greg Kroah-Hartman" <greg@...ah.com>,
	linux-usb-devel@...ts.sourceforge.net
Subject: Re: [PATCH -mm] sisusbvga: Fix bug and build warnings

On 02/09/07, Satyam Sharma <satyam@...radead.org> wrote:
>
> drivers/usb/misc/sisusbvga/sisusb.c: In function 'usb_sisusb_init':
> drivers/usb/misc/sisusbvga/sisusb.c:3321: warning: unused variable 'sisusb'
> drivers/usb/misc/sisusbvga/sisusb.c:3320: warning: unused variable 'retval'
>
> are trivially solved by getting rid of the unused variables.
>
> drivers/usb/misc/sisusbvga/sisusb.c: In function 'sisusb_open':
> drivers/usb/misc/sisusbvga/sisusb.c:2444: warning: 'sisusb' is used uninitialized in this function
>
> is a genuine bug (which will cause oops). We cannot use "sisusb" in
> error path for (!interface), because sisusb will itself be derived
> from "interface" later.
>
> Signed-off-by: Satyam Sharma <satyam@...radead.org>
>
> ---
>
>  drivers/usb/misc/sisusbvga/sisusb.c |    7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
>
> --- linux-2.6.23-rc4-mm1/drivers/usb/misc/sisusbvga/sisusb.c‾fix        2007-09-02 19:06:01.000000000 +0530
> +++ linux-2.6.23-rc4-mm1/drivers/usb/misc/sisusbvga/sisusb.c    2007-09-02 19:10:52.000000000 +0530
> @@ -2440,10 +2440,8 @@ sisusb_open(struct inode *inode, struct
>         struct usb_interface *interface;
>         int subminor = iminor(inode);
>
> -       if (!(interface = usb_find_interface(&sisusb_driver, subminor))) {
> -               dev_err(&sisusb->sisusb_dev->dev, "Failed to find interface¥n");

Odd how in your patch the line ends with  "¥n"  but if I look in my
local copy of the source tree I see  "\n".


-- 
Jesper Juhl <jesper.juhl@...il.com>
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