[PATCH 4/5] Return bool in virNetDevFeatureAvailable

[Ján Tomko <jtomko@xxxxxxxxxx>]

Simplify the logic
---
 src/util/virnetdev.c | 27 ++++++++++++---------------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/src/util/virnetdev.c b/src/util/virnetdev.c
index 4705891..52f02d3 100644
--- a/src/util/virnetdev.c
+++ b/src/util/virnetdev.c
@@ -3254,15 +3254,14 @@ struct ethtool_to_virnetdev_feature {
 *
 * Returns 0 if not found, 1 on success, and -1 on failure.
 */
-static int
+static bool
 virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
 {
-    int ret = -1;
-
     cmd = (void*)cmd;
-    if (!virNetDevSendEthtoolIoctl(ifname, cmd))
-        ret = cmd->data > 0 ? 1 : 0;
-    return ret;
+    if (virNetDevSendEthtoolIoctl(ifname, cmd) == 0 &&
+        cmd->data > 0)
+        return true;
+    return false;
 }
 
 
@@ -3307,12 +3306,12 @@ virNetDevGetEthtoolFeatures(virBitmapPtr bitmap,
 
     for (i = 0; i < ARRAY_CARDINALITY(ethtool_cmds); i++) {
         cmd.cmd = ethtool_cmds[i].cmd;
-        if (virNetDevFeatureAvailable(ifname, &cmd) == 1)
+        if (virNetDevFeatureAvailable(ifname, &cmd))
             ignore_value(virBitmapSetBit(bitmap, ethtool_cmds[i].feat));
     }
 
     cmd.cmd = ETHTOOL_GFLAGS;
-    if (virNetDevFeatureAvailable(ifname, &cmd) == 1) {
+    if (virNetDevFeatureAvailable(ifname, &cmd)) {
         for (i = 0; i < ARRAY_CARDINALITY(flags); i++) {
             if (cmd.data & flags[i].cmd)
                 ignore_value(virBitmapSetBit(bitmap, flags[i].feat));
@@ -3332,15 +3331,13 @@ virNetDevGetEthtoolFeatures(virBitmapPtr bitmap,
  *
  * Returns 0 if not found, 1 on success, and -1 on failure.
  */
-static int
+static bool
 virNetDevGFeatureAvailable(const char *ifname, struct ethtool_gfeatures *cmd)
 {
-    int ret = -1;
-
     cmd = (void*)cmd;
-    if (!virNetDevSendEthtoolIoctl(ifname, cmd))
-        ret = FEATURE_BIT_IS_SET(cmd->features, TX_UDP_TNL, active);
-    return ret;
+    if (virNetDevSendEthtoolIoctl(ifname, cmd) == 0)
+        return !!FEATURE_BIT_IS_SET(cmd->features, TX_UDP_TNL, active);
+    return false;
 }
 
 
@@ -3356,7 +3353,7 @@ virNetDevGetEthtoolGFeatures(virBitmapPtr bitmap,
 
     g_cmd->cmd = ETHTOOL_GFEATURES;
     g_cmd->size = GFEATURES_SIZE;
-    if (virNetDevGFeatureAvailable(ifname, g_cmd) == 1)
+    if (virNetDevGFeatureAvailable(ifname, g_cmd))
         ignore_value(virBitmapSetBit(bitmap, VIR_NET_DEV_FEAT_TXUDPTNL));
     VIR_FREE(g_cmd);
     return 0;
-- 
2.7.3

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