From: Jesse Brandeburg <jbrandeb...@cloudflare.com>
If the CONFIG_INFINIBAND_IRDMA symbol is not enabled as a module or a
built-in, then don't let the driver reserve resources for RDMA. The result
of this change is a large savings in resources for older kernels, and a
cleaner driver configuration for the IRDMA=n case for old and new kernels.
Implement this by avoiding enabling the RDMA capability when scanning
hardware capabilities.
Note: Loading the out-of-tree irdma driver in connection to the in-kernel
ice driver, is not supported, and should not be attempted, especially when
disabling IRDMA in the kernel config.
Fixes: d25a0fc41c1f ("ice: Initialize RDMA support")
Signed-off-by: Jesse Brandeburg <jbrandeb...@cloudflare.com>
Acked-by: Dave Ertman <david.m.ert...@intel.com>
---
v2: resend with acks, add note about oot irdma (Leon), reword commit
message
v1: https://lore.kernel.org/netdev/20241114000105.703740-1-jbran...@kernel.org/
---
drivers/net/ethernet/intel/ice/ice_common.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_common.c
b/drivers/net/ethernet/intel/ice/ice_common.c
index 7a2a2e8da8fa..1e801300310e 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -2271,7 +2271,8 @@ ice_parse_common_caps(struct ice_hw *hw, struct
ice_hw_common_caps *caps,
caps->nvm_unified_update);
break;
case ICE_AQC_CAPS_RDMA:
- caps->rdma = (number == 1);
+ if (IS_ENABLED(CONFIG_INFINIBAND_IRDMA))
+ caps->rdma = (number == 1);
ice_debug(hw, ICE_DBG_INIT, "%s: rdma = %d\n", prefix,
caps->rdma);
break;
case ICE_AQC_CAPS_MAX_MTU:
--
2.43.0
