IB/hfi1: Correct guard on eager buffer deallocation

commit 9292f8f9a2ac42eb320bced7153aa2e63d8cc13a upstream.

The code tests the dma address which legitimately can be 0.

The code should test the kernel logical address to avoid leaking eager
buffer allocations that happen to map to a dma address of 0.

Fixes: 60368186fd85 ("IB/hfi1: Fix user-space buffers mapping with IOMMU enabled")
Link: https://lore.kernel.org/r/20211129191952.101968.17137.stgit@awfm-01.cornelisnetworks.com
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 27e7de4c4a34bc5c749e682ead3191ef1c9c5d8d..3f6e6233c60e00355f994efcb4bd4b12682b1e4f 100644 (file)
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1138,7 +1138,7 @@ void hfi1_free_ctxtdata(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
        rcd->egrbufs.rcvtids = NULL;
 
        for (e = 0; e < rcd->egrbufs.alloced; e++) {
-               if (rcd->egrbufs.buffers[e].dma)
+               if (rcd->egrbufs.buffers[e].addr)
                        dma_free_coherent(&dd->pcidev->dev,
                                          rcd->egrbufs.buffers[e].len,
                                          rcd->egrbufs.buffers[e].addr,