From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: [PATCH v5 29/45] vhost/net: force len for TX to host endian Date: Thu, 27 Nov 2014 14:32:29 +0200 Message-ID: <1417091078-24611-30-git-send-email-mst@redhat.com> References: <1417091078-24611-1-git-send-email-mst@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: thuth@linux.vnet.ibm.com, kvm@vger.kernel.org, rusty@au1.ibm.com, netdev@vger.kernel.org, virtualization@lists.linux-foundation.org, dahi@linux.vnet.ibm.com, pbonzini@redhat.com, David Miller To: linux-kernel@vger.kernel.org Return-path: Content-Disposition: inline In-Reply-To: <1417091078-24611-1-git-send-email-mst@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Id: netdev.vger.kernel.org vhost/net keeps a copy of some used ring but (ab)uses length field for internal house-keeping. This works because for tx used length is always 0. Suppress sparse errors: we use native endian-ness internally but never expose it to guest. Signed-off-by: Michael S. Tsirkin --- drivers/vhost/net.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 8dae2f7..dce5c58 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -48,15 +48,15 @@ MODULE_PARM_DESC(experimental_zcopytx, "Enable Zero Copy TX;" * status internally; used for zerocopy tx only. */ /* Lower device DMA failed */ -#define VHOST_DMA_FAILED_LEN 3 +#define VHOST_DMA_FAILED_LEN ((__force __virtio32)3) /* Lower device DMA done */ -#define VHOST_DMA_DONE_LEN 2 +#define VHOST_DMA_DONE_LEN ((__force __virtio32)2) /* Lower device DMA in progress */ -#define VHOST_DMA_IN_PROGRESS 1 +#define VHOST_DMA_IN_PROGRESS ((__force __virtio32)1) /* Buffer unused */ -#define VHOST_DMA_CLEAR_LEN 0 +#define VHOST_DMA_CLEAR_LEN ((__force __virtio32)0) -#define VHOST_DMA_IS_DONE(len) ((len) >= VHOST_DMA_DONE_LEN) +#define VHOST_DMA_IS_DONE(len) ((__force u32)(len) >= (__force u32)VHOST_DMA_DONE_LEN) enum { VHOST_NET_FEATURES = VHOST_FEATURES | -- MST