From: Roland Dreier <rolandd@cisco.com>
Date: Fri, 16 Feb 2007 21:57:33 +0000 (-0800)
Subject: IB/mthca: Fix allocation of ICM chunks in coherent memory
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=11282b32a4ed7bb5fc390c83a1d6b9bc8017882c;p=linux.git

IB/mthca: Fix allocation of ICM chunks in coherent memory

The change to allow allocating ICM chunks from coherent memory did not
increment the count of sg entries properly, so a chunk that required
more than allocation would not be mapped properly by the HCA.

Fix this by adding the missing increment of chunk->nsg.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index 0b9d053a599d2..48f7c65e9aedb 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -175,7 +175,9 @@ struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
 		if (!ret) {
 			++chunk->npages;
 
-			if (!coherent && chunk->npages == MTHCA_ICM_CHUNK_LEN) {
+			if (coherent)
+				++chunk->nsg;
+			else if (chunk->npages == MTHCA_ICM_CHUNK_LEN) {
 				chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
 							chunk->npages,
 							PCI_DMA_BIDIRECTIONAL);