On Wed, Feb 23, 2011 at 12:19:56PM -0800, Haiyang Zhang wrote:
> The patch fixed the code depending on the exact order of fields in the
> struct netvsc_driver_context. Now, we use container_of() instead of type
> casting from the first field to the container struct.
>
> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
> Signed-off-by: Hank Janssen <hjanssen@xxxxxxxxxxxxx>
>
> ---
> drivers/staging/hv/netvsc_drv.c | 14 ++++++--------
> 1 files changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
> index 364b6c7..c78624c 100644
> --- a/drivers/staging/hv/netvsc_drv.c
> +++ b/drivers/staging/hv/netvsc_drv.c
> @@ -49,8 +49,6 @@ struct net_device_context {
> };
>
> struct netvsc_driver_context {
> - /* !! These must be the first 2 fields !! */
> - /* Which is a bug FIXME! */
> struct driver_context drv_ctx;
> struct netvsc_driver drv_obj;
> };
> @@ -137,8 +135,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
> struct net_device_context *net_device_ctx = netdev_priv(net);
> struct driver_context *driver_ctx =
> driver_to_driver_context(net_device_ctx->device_ctx->device.driver);
> - struct netvsc_driver_context *net_drv_ctx =
> - (struct netvsc_driver_context *)driver_ctx;
> + struct netvsc_driver_context *net_drv_ctx = container_of(driver_ctx,
> + struct netvsc_driver_context, drv_ctx);
> struct netvsc_driver *net_drv_obj = &net_drv_ctx->drv_obj;
> struct hv_netvsc_packet *packet;
> int ret;
> @@ -342,8 +340,8 @@ static int netvsc_probe(struct device *device)
> {
> struct driver_context *driver_ctx =
> driver_to_driver_context(device->driver);
> - struct netvsc_driver_context *net_drv_ctx =
> - (struct netvsc_driver_context *)driver_ctx;
> + struct netvsc_driver_context *net_drv_ctx = container_of(driver_ctx,
> + struct netvsc_driver_context, drv_ctx);
container_of calls should be turned into either a macro, or an inline
function, to make them smaller and easier to understand what is going
on. Do that and you will solve the line-length problems as well.
Please do that here.
thanks,
greg k-h
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