[libvirt] [PATCH] virNetDevMacVLanTapSetup: Drop @multiqueue argument

[Michal Privoznik]

Firstly, there's a bug (or typo) in the only place where we call
this function: @multiqueue is set whenever @tapfdSize is greater
than zero, while in fact the condition should have been 'greater
than one'.
Then, secondly, since the condition depends on just one
variable, that we are even passing down to the function, we can
move the condition into the function and drop useless argument.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 src/util/virnetdevmacvlan.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/util/virnetdevmacvlan.c b/src/util/virnetdevmacvlan.c
index 8fc71af..496416e 100644
--- a/src/util/virnetdevmacvlan.c
+++ b/src/util/virnetdevmacvlan.c
@@ -289,12 +289,11 @@ virNetDevMacVLanTapOpen(const char *ifname,
  * @tapfd: array of file descriptors of the macvtap tap
  * @tapfdSize: number of file descriptors in @tapfd
  * @vnet_hdr: whether to enable or disable IFF_VNET_HDR
- * @multiqueue: whether to enable or disable IFF_MULTI_QUEUE
  *
- * Turn on the IFF_VNET_HDR flag if requested and available, but make sure it's
- * off otherwise. Similarly, turn on IFF_MULTI_QUEUE if requested, but if it
- * can't be set, consider it a fatal error (rather than ignoring as with
- * @vnet_hdr).
+ * Turn on the IFF_VNET_HDR flag if requested and available, but make sure
+ * it's off otherwise. Similarly, turn on IFF_MULTI_QUEUE if @tapfdSize is
+ * greater than one, but if it can't be set, consider it a fatal error
+ * (rather than ignoring as with @vnet_hdr).
  *
  * A fatal error is defined as the VNET_HDR flag being set but it cannot
  * be turned off for some reason. This is reported with -1. Other fatal
@@ -304,7 +303,7 @@ virNetDevMacVLanTapOpen(const char *ifname,
  * Returns 0 on success, -1 in case of fatal error.
  */
 static int
-virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr, bool multiqueue)
+virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr)
 {
     unsigned int features;
     struct ifreq ifreq;
@@ -335,12 +334,12 @@ virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr, bool multi
         }
 
 # ifdef IFF_MULTI_QUEUE
-        if (multiqueue)
+        if (tapfdSize > 1)
             new_flags |= IFF_MULTI_QUEUE;
         else
             new_flags &= ~IFF_MULTI_QUEUE;
 # else
-        if (multiqueue) {
+        if (tapfdSize > 1) {
             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
                            _("Multiqueue devices are not supported on this system"));
             return -1;
@@ -870,7 +869,7 @@ int virNetDevMacVLanCreateWithVPortProfile(const char *tgifname,
         if (virNetDevMacVLanTapOpen(cr_ifname, tapfd, tapfdSize, 10) < 0)
             goto disassociate_exit;
 
-        if (virNetDevMacVLanTapSetup(tapfd, tapfdSize, vnet_hdr, tapfdSize > 0) < 0) {
+        if (virNetDevMacVLanTapSetup(tapfd, tapfdSize, vnet_hdr) < 0) {
             VIR_FORCE_CLOSE(rc); /* sets rc to -1 */
             goto disassociate_exit;
         }
-- 
2.4.10