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Commit 17069d32 authored by Sebastian Ott's avatar Sebastian Ott Committed by Doug Ledford
Browse files

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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent d3a2418e

drivers/infiniband/core/umem.c

+1 −1
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d 


	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) {