From mboxrd@z Thu Jan 1 00:00:00 1970 From: keith.busch@intel.com (Keith Busch) Date: Mon, 17 Jul 2017 19:45:39 -0400 Subject: [PATCH] nvme/pci: Fix HMB size calculation Message-ID: <1500335139-6338-1-git-send-email-keith.busch@intel.com> It's possible the preferred HMB size may not be a multiple of the chunk_size. This patch will set the chunk_size to the descriptor's actual length so the last iteration doesn't cause the total size to exceed the allocated HMB size. Signed-off-by: Keith Busch --- drivers/nvme/host/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index d321597..e22ffda 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1641,6 +1641,7 @@ static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred) if (!bufs[i]) break; + chunk_size = len; descs[i].addr = cpu_to_le64(dma_addr); descs[i].size = cpu_to_le32(len / dev->ctrl.page_size); i++; -- 2.5.5