RDMA/core: Free pfn_list with appropriate kvfree call

JIRA: https://issues.redhat.com/browse/RHEL-110100

commit 111aea0
Author: Akhilesh Patil <akhilesh@ee.iitb.ac.in>
Date:   Sun Aug 10 23:21:58 2025 +0530

    RDMA/core: Free pfn_list with appropriate kvfree call

    Ensure that pfn_list allocated by kvcalloc() is freed using corresponding
    kvfree() function. Match memory allocation and free routines kvcalloc -> kvfree.

    Fixes: 259e9bd ("RDMA/core: Avoid hmm_dma_map_alloc() for virtual DMA devices")
    Signed-off-by: Akhilesh Patil <akhilesh@ee.iitb.ac.in>
    Link: https://patch.msgid.link/aJjcPjL1BVh8QrMN@bhairav-test.ee.iitb.ac.in
    Signed-off-by: Leon Romanovsky <leon@kernel.org>

Signed-off-by: Kamal Heib <kheib@redhat.com>

Author: Kamalheib

drivers/infiniband/core/umem_odp.c

@@ -115,7 +115,7 @@ static int ib_init_umem_odp(struct ib_umem_odp *umem_odp,
 
 out_free_map:
 	if (ib_uses_virt_dma(dev))
-		kfree(map->pfn_list);
+		kvfree(map->pfn_list);
 	else
 		hmm_dma_map_free(dev->dma_device, map);
 	return ret;
@@ -287,7 +287,7 @@ static void ib_umem_odp_free(struct ib_umem_odp *umem_odp)
 	mutex_unlock(&umem_odp->umem_mutex);
 	mmu_interval_notifier_remove(&umem_odp->notifier);
 	if (ib_uses_virt_dma(dev))
-		kfree(umem_odp->map.pfn_list);
+		kvfree(umem_odp->map.pfn_list);
 	else
 		hmm_dma_map_free(dev->dma_device, &umem_odp->map);
 }