[PATCH v6 30/46] vhost/net: force len for TX to host endian

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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 <mst@xxxxxxxxxx>
---
 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

--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux