diff mbox series

[v2] net/virtio: fix wrong variable assignment in helper macro

Message ID 20200813072503.1411-1-vipul.ashri@oracle.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers
Series [v2] net/virtio: fix wrong variable assignment in helper macro |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-testing success Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS

Commit Message

Vipul Ashri Aug. 13, 2020, 7:25 a.m. UTC 
Inside Macro ASSIGN_UNLESS_EQUAL(var, val), assignment to var is always
failing as assignment done using var_ having local scope only.
This leads to TX packets not going out and found broken due to cleanup
malfunctioning. This patch fixes the wrong variable assignment.

Fixes: 57f90f894588 ("net/virtio: reuse packed ring functions")
Cc: stable@dpdk.org

Signed-off-by: Vipul Ashri <vipul.ashri@oracle.com>
---
 drivers/net/virtio/virtqueue.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 105a9c00c..20c95471e 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h
@@ -607,10 +607,8 @@  virtqueue_notify(struct virtqueue *vq)
 
 /* avoid write operation when necessary, to lessen cache issues */
 #define ASSIGN_UNLESS_EQUAL(var, val) do {	\
-	typeof(var) var_ = (var);		\
-	typeof(val) val_ = (val);		\
-	if ((var_) != (val_))			\
-		(var_) = (val_);		\
+	if ((var) != (val))			\
+		(var) = (val);			\
 } while (0)
 
 #define virtqueue_clear_net_hdr(hdr) do {		\