ntb_perf: pass correct struct device to dma_alloc_coherent

[ Upstream commit 98f4e140264eeb52f22ff05be6b6dd48237255ac ]

Currently, ntb->dev is passed to dma_alloc_coherent
and dma_free_coherent calls. The returned dma_addr_t
is the CPU physical address. This works fine as long
as IOMMU is disabled. But when IOMMU is enabled, we
need to make sure that IOVA is returned for dma_addr_t.
So the correct way to achieve this is by changing the
first parameter of dma_alloc_coherent() as ntb->pdev->dev
instead.

Fixes: 5648e56d03fa ("NTB: ntb_perf: Add full multi-port NTB API support")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 972f6d984f6d6e0d0dbc4ab077cec323e1f38535..1c93b9f5c73bc6d9ca62f08b47cfbda724b0f3b6 100644 (file)
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -557,7 +557,7 @@ static void perf_free_inbuf(struct perf_peer *peer)
                return;
 
        (void)ntb_mw_clear_trans(peer->perf->ntb, peer->pidx, peer->gidx);
-       dma_free_coherent(&peer->perf->ntb->dev, peer->inbuf_size,
+       dma_free_coherent(&peer->perf->ntb->pdev->dev, peer->inbuf_size,
                          peer->inbuf, peer->inbuf_xlat);
        peer->inbuf = NULL;
 }
@@ -586,8 +586,9 @@ static int perf_setup_inbuf(struct perf_peer *peer)
 
        perf_free_inbuf(peer);
 
-       peer->inbuf = dma_alloc_coherent(&perf->ntb->dev, peer->inbuf_size,
-                                        &peer->inbuf_xlat, GFP_KERNEL);
+       peer->inbuf = dma_alloc_coherent(&perf->ntb->pdev->dev,
+                                        peer->inbuf_size, &peer->inbuf_xlat,
+                                        GFP_KERNEL);
        if (!peer->inbuf) {
                dev_err(&perf->ntb->dev, "Failed to alloc inbuf of %pa\n",
                        &peer->inbuf_size);
@@ -1554,4 +1555,3 @@ static void __exit perf_exit(void)
        destroy_workqueue(perf_wq);
 }
 module_exit(perf_exit);
-