I committed this change, which should help a little
(pci_alloc_consistent() is implicitly GFP_ATOMIC).
- R.
Index: infiniband/hw/mthca/mthca_qp.c
===================================================================
--- infiniband/hw/mthca/mthca_qp.c (revision 1265)
+++ infiniband/hw/mthca/mthca_qp.c (working copy)
@@ -967,8 +967,8 @@
u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1;
sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE;
- sqp->header_buf = pci_alloc_consistent(dev->pdev, sqp->header_buf_size,
- &sqp->header_dma);
+ sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev,
sqp->header_buf_size,
+ &sqp->header_dma, GFP_KERNEL);
if (!sqp->header_buf)
return -ENOMEM;
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