Re: [BUGI] IOCTL :Facing problems while acccessing data from kernel space

From: n0g0013 (ttw_at_cobbled.net)
Date: 09/29/05

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    Date: Wed, 28 Sep 2005 23:13:22 +0100
To: rashmi ns <nsrashmi@gmail.com>

    On 28.09-13:40, rashmi ns wrote:
    [ ... ]
    > I was trying to add a new ioctl command like
    > > #define HDLCMODE _IOR('6',0xF,int)
    > > when i trying to uprintf the data which was sent from the user-space in
    > > the device-driver-ioctl-routine i'll get a different value than which was
    > > passed. Can anybody please tell me why this is happening . I pass the
    > > address of an integer where data is stored from the user space as third arg
    > > to the ioctl call .

    i would guess that it's a simple typo and your pointer conversions
    are off somewhere.

    i.e.

            uprintf( "%d", (int*)data ) ;

    instead of

            uprintf( "%d", *(int*)data ) ;

    otherwise, use a debugger or post the code. 

    -- 
        t
 t
                 w
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