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    Subject[patch 2/2] ip2: return -EFAULT on copy_to_user errors
    copy_to_user() returns the number of bytes remaining but we want to
    return a negative error code on errors.

    Signed-off-by: Dan Carpenter <error27@gmail.com>

    diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
    index 8fa041e..d4b71e8 100644
    --- a/drivers/char/ip2/ip2main.c
    +++ b/drivers/char/ip2/ip2main.c
    @@ -2930,6 +2930,8 @@ ip2_ipl_ioctl (struct file *pFile, UINT cmd, ULONG arg )
    if ( pCh )
    {
    rc = copy_to_user(argp, pCh, sizeof(i2ChanStr));
    + if (rc)
    + rc = -EFAULT;
    } else {
    rc = -ENODEV;
    }

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