IB/hfi1: Correct guard on eager buffer deallocation

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>

diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index dbd1c31..8e1236b 100644 (file)
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1120,7 +1120,7 @@ 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,