gpu: fix breakage with allow/deny list being empty

Signed-off-by: Tuomas Katila <[email protected]>

Author: tkatila

cmd/gpu_plugin/gpu_plugin.go

@@ -207,6 +207,10 @@ func packedPolicy(req *pluginapi.ContainerPreferredAllocationRequest) []string {
 }
 
 func validatePCIDeviceIDs(pciIDList string) error {
+	if len(pciIDList) == 0 {
+		return nil
+	}
+
 	r := regexp.MustCompile(`^0x[0-9a-f]{4}$`)
 
 	for id := range strings.SplitSeq(pciIDList, ",") {

cmd/gpu_plugin/gpu_plugin_test.go

@@ -1160,7 +1160,7 @@ func TestParsePCIDeviceIDs(t *testing.T) {
 		{
 			name:      "empty string",
 			input:     "",
-			wantError: true,
+			wantError: false,
 		},
 		{
 			name:      "invalid ID format",
@@ -1193,3 +1193,51 @@ func TestParsePCIDeviceIDs(t *testing.T) {
 		})
 	}
 }
+
+func TestCheckAllowDenyOptions(t *testing.T) {
+	tcases := []struct {
+		name         string
+		options      cliOptions
+		expectReturn bool
+	}{
+		{
+			name:         "valid allow IDs",
+			options:      cliOptions{allowIDs: "0x1234,0x5678"},
+			expectReturn: false,
+		},
+		{
+			name:         "valid deny IDs",
+			options:      cliOptions{denyIDs: "0x1234,0x5678"},
+			expectReturn: false,
+		},
+		{
+			name:         "both allow and deny IDs",
+			options:      cliOptions{allowIDs: "0x1234", denyIDs: "0x5678"},
+			expectReturn: true,
+		},
+		{
+			name:         "invalid allow ID format",
+			options:      cliOptions{allowIDs: "0x1234,abcd"},
+			expectReturn: true,
+		},
+		{
+			name:         "invalid deny ID format",
+			options:      cliOptions{denyIDs: "0x1234,abcd"},
+			expectReturn: true,
+		},
+		{
+			name:         "both empty",
+			options:      cliOptions{allowIDs: "", denyIDs: ""},
+			expectReturn: false,
+		},
+	}
+
+	for _, tc := range tcases {
+		t.Run(tc.name, func(t *testing.T) {
+			ret := checkAllowDenyOptions(tc.options)
+			if ret == tc.expectReturn {
+				t.Errorf("checkAllowDenyOptions() return = %v, expected %v", ret, tc.expectReturn)
+			}
+		})
+	}
+}