IB/core: fix unmap_sg argument
__ib_umem_release calls dma_unmap_sg with a different number of
sg_entries than ib_umem_get uses for dma_map_sg. This might cause
trouble for implementations that merge sglist entries and results
in the following dma debug complaint:
DMA-API: device driver frees DMA sg list with different entry
count [map count=2] [unmap count=1]
Fix it by using the correct value.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c
index 224ad27..0120e7f 100644
--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -51,7 +51,7 @@
if (umem->nmap > 0)
ib_dma_unmap_sg(dev, umem->sg_head.sgl,
- umem->nmap,
+ umem->npages,
DMA_BIDIRECTIONAL);
for_each_sg(umem->sg_head.sgl, sg, umem->npages, i) {