[PATCH] nvme/pci: Fix HMB size calculation

[Keith Busch]

On Mon, Jul 17, 2017 at 07:45:39PM -0400, Keith Busch wrote:
> 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 <keith.busch at intel.com>

Reported-by: Dan Carpenter <dan.carpenter at oracle.com>

> ---
>  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
>