github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 10:33:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

RDMA/ionic: Preserve and set Ethernet source MAC after ib_ud_header_init()

Browse Source 
ionic_build_hdr() populated the Ethernet source MAC (hdr->eth.smac_h) by
passing the header’s storage directly to rdma_read_gid_l2_fields().
However, ib_ud_header_init() is called after that and re-initializes the
UD header, which wipes the previously written smac_h. As a result, packets
are emitted with an zero source MAC address on the wire.

Correct the source MAC by reading the GID-derived smac into a temporary
buffer and copy it after ib_ud_header_init() completes.

Fixes: e8521822c7 ("RDMA/ionic: Register device ops for control path")
Cc: stable@vger.kernel.org # 6.18
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Link: https://patch.msgid.link/20260227061809.2979990-1-abhijit.gangurde@amd.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Abhijit Gangurde 2026-02-27 11:48:09 +05:30 committed by Leon Romanovsky
parent 29a3edd700
commit a08aaf3968
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/infiniband/hw/ionic/ionic_controlpath.c
View File

@ -508,6 +508,7 @@ static int ionic_build_hdr(struct ionic_ibdev *dev,
{
const struct ib_global_route *grh;
enum rdma_network_type net;
u8 smac[ETH_ALEN];
u16 vlan;
int rc;
@ -518,7 +519,7 @@ static int ionic_build_hdr(struct ionic_ibdev *dev,
grh = rdma_ah_read_grh(attr);
rc = rdma_read_gid_l2_fields(grh->sgid_attr, &vlan, &hdr->eth.smac_h[0]);
rc = rdma_read_gid_l2_fields(grh->sgid_attr, &vlan, smac);
if (rc)
return rc;
@ -536,6 +537,7 @@ static int ionic_build_hdr(struct ionic_ibdev *dev,
if (rc)
return rc;
ether_addr_copy(hdr->eth.smac_h, smac);
ether_addr_copy(hdr->eth.dmac_h, attr->roce.dmac);
if (net == RDMA_NETWORK_IPV4) {