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RDMA/cxgb4: Convert to ib_respond_udata()

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These cases carefully work around 32-bit unpadded structures, but
the min integrated into ib_respond_udata() handles this
automatically. Zero-initialize data that would not have been copied.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Jason Gunthorpe 2026-05-11 21:09:34 -03:00 committed by Leon Romanovsky
parent 5189936049
commit addf681eed
2 changed files with 5 additions and 8 deletions
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8
drivers/infiniband/hw/cxgb4/cq.c
View File

@ -1115,13 +1115,11 @@ int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
/* communicate to the userspace that
* kernel driver supports 64B CQE
*/
uresp.flags |= C4IW_64B_CQE;
if (!ucontext->is_32b_cqe)
uresp.flags |= C4IW_64B_CQE;
spin_unlock(&ucontext->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp,
ucontext->is_32b_cqe ?
sizeof(uresp) - sizeof(uresp.flags) :
sizeof(uresp));
ret = ib_respond_udata(udata, uresp);
if (ret)
goto err_free_mm2;

5
drivers/infiniband/hw/cxgb4/provider.c
View File

@ -80,7 +80,7 @@ static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
struct ib_device *ibdev = ucontext->device;
struct c4iw_ucontext *context = to_c4iw_ucontext(ucontext);
struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
struct c4iw_alloc_ucontext_resp uresp;
struct c4iw_alloc_ucontext_resp uresp = {};
int ret = 0;
struct c4iw_mm_entry *mm = NULL;
@ -106,8 +106,7 @@ static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
context->key += PAGE_SIZE;
spin_unlock(&context->mmap_lock);
ret = ib_copy_to_udata(udata, &uresp,
sizeof(uresp) - sizeof(uresp.reserved));
ret = ib_respond_udata(udata, uresp);
if (ret)
goto err_mm;