RDMA/irdma: Fix legacy i40iw compat check in create_qp

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The irdma driver maintains backward compatibility with the
legacy i40iw userspace provider by checking the length of
the user response buffer in irdma_create_qp.

Previously, the check relied on udata->outlen < sizeof(uresp).
That is technically okay since there have only ever been two
sizes for the resp struct (legacy and current). However, it
would be a problem if the resp struct is ever expanded in
the future because it would end up triggering the legacy
fallback path for non-legacy irdma providers that just  haven't
moved over to the newer expanded struct yet.

Fix this by explicitly checking for the exact legacy resp size.

Signed-off-by: Jacob Moroni <jmoroni@google.com>
Link: https://patch.msgid.link/20260713171257.3131493-6-jmoroni@google.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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Jacob Moroni 2026-07-13 17:12:56 +00:00 • committed by Leon Romanovsky

parent 173fc2b8dc

commit 628f33362e

1 changed files with 6 additions and 2 deletions

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drivers/infiniband/hw/irdma/verbs.c

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