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 a2e8985253252be71e90e3b548014311ba1c4d4d..ec2a45c5cf575eb5114252292f0d24a1ada29ef2 100644 (file)
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1106,7 +1106,7 @@ 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,