[ofa-general] RE: [PATCH] rdma_cm: fix port type (fix bug 557)

[Sean Hefty]

Vlad, can you please pull this change into OFED?

> next_port should be between sysctl_local_port_range[0] and [1].  However,
> it is initially set to a random value.  If the value is negative, next_port
> can fall outside of this range because of the % operator returning a
> negative value.
> 
> Signed-off-by: Sean Hefty <sean.hefty at intel.com>
> ---
> 
>  drivers/infiniband/core/cma.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
> index eb15119..b0831cb 100644
> --- a/drivers/infiniband/core/cma.c
> +++ b/drivers/infiniband/core/cma.c
> @@ -2772,8 +2772,8 @@ static int cma_init(void)
>  	int ret;
>  
>  	get_random_bytes(&next_port, sizeof next_port);
> -	next_port = (next_port % (sysctl_local_port_range[1] -
> -				  sysctl_local_port_range[0])) +
> +	next_port = ((unsigned int) next_port %
> +		    (sysctl_local_port_range[1] - sysctl_local_port_range[0])) +
>  		    sysctl_local_port_range[0];
>  	cma_wq = create_singlethread_workqueue("rdma_cm");
>  	if (!cma_wq)
> 
>