[Bug 1115710] Re: Mellanox mlx4_en network driver is not automatically loaded

[Talat Batheesh]

Hi,

This Fix is for old releases that doesn't include mlx4_en in their initramfs.
Now, that the initrd include the mlx4_en, so no need to creating a mlx4.conf file with softdep mlx4_core post: mlx4_en
After removing this file we see that mlx4_en loaded after boot due to mlx4_core request a module according to the port type -

drivers/net/ethernet/mellanox/mlx4/main.c
static void mlx4_request_modules(struct mlx4_dev *dev)
{
        int port;
        int has_ib_port = false;
        int has_eth_port = false;
#define EN_DRV_NAME     "mlx4_en"
#define IB_DRV_NAME     "mlx4_ib"

        for (port = 1; port <= dev->caps.num_ports; port++) {
                if (dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
                        has_ib_port = true;
                else if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
                        has_eth_port = true;
        }

        if (has_eth_port)
                request_module_nowait(EN_DRV_NAME);
        if (has_ib_port || (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE))
                request_module_nowait(IB_DRV_NAME);
}


We are debianize rdma-utils package that create a file /etc/modpobe.d/mlx4.conf, according to Debian policy  package shouldn't modify files installed by another package in any way, it's forbidden.
in addition the rdma service create the same file name and add the following 
install mlx4_core /sbin/modprobe --ignore-install mlx4_core && (if [ -f /usr/libexec/mlx4-setup.sh -a -f /etc/rdma/mlx4.conf ]; then /usr/libexec/mlx4-setup.sh < /etc/rdma/mlx4.conf; fi; /sbin/modprobe mlx4_en; /sbin/modprobe mlx4_ib)
this should load the diver with the requested port type configuration.

could you please revert this fix?

Thanks,
Talat

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https://bugs.launchpad.net/bugs/1115710

Title:
  Mellanox mlx4_en network driver is not automatically loaded

Status in MAAS:
  Invalid
Status in kmod package in Ubuntu:
  Fix Released
Status in module-init-tools package in Ubuntu:
  Invalid
Status in module-init-tools source package in Precise:
  Triaged
Status in module-init-tools source package in Quantal:
  Won't Fix
Status in kmod source package in Raring:
  Fix Released

Bug description:
  The Mellanox Ethernet card module is not being loaded in the ephemeral
  images, which causes enlisting/commissioning to fail to boot the root
  image from ISCSI, given that the interface is not loaded.

  Related bugs:
   * bug 1015339: installer initrd missing kernel modules for Mellanox ConnectX HCA Ethernet

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