Use new iohook_open_nul_fd() API

Makes error handling more consistent

amex/ds.c

@@ -85,7 +85,11 @@ HRESULT ds_hook_init(const struct ds_config *cfg)
         return hr;
     }
 
-    ds_fd = iohook_open_dummy_fd();
+    hr = iohook_open_nul_fd(&ds_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
 
     return S_OK;
 }

amex/gpio.c

@@ -89,7 +89,12 @@ HRESULT gpio_hook_init(const struct gpio_config *cfg)
 
     memcpy(&gpio_config, cfg, sizeof(*cfg));
 
-    gpio_fd = iohook_open_dummy_fd();
+    hr = iohook_open_nul_fd(&gpio_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
     hr = iohook_push_handler(gpio_handle_irp);
 
     if (FAILED(hr)) {

amex/jvs.c

@@ -50,7 +50,12 @@ HRESULT jvs_hook_init(const struct jvs_config *cfg)
         return S_FALSE;
     }
 
-    jvs_fd = iohook_open_dummy_fd();
+    hr = iohook_open_nul_fd(&jvs_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
     hr = iohook_push_handler(jvs_handle_irp);
 
     if (FAILED(hr)) {

board/io4.c

@@ -99,17 +99,30 @@ static void *io4_ops_ctx;
 
 HRESULT io4_hook_init(const struct io4_ops *ops, void *ctx)
 {
+    HRESULT hr;
+
     assert(ops != NULL);
 
     async_init(&io4_async, NULL);
 
-    io4_fd = iohook_open_dummy_fd();
+    hr = iohook_open_nul_fd(&io4_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
     io4_ops = ops;
     io4_ops_ctx = ctx;
     io4_system_status = 0x02; /* idk */
     iohook_push_handler(io4_handle_irp);
 
-    return setupapi_add_phantom_dev(&hid_guid, io4_path);
+    hr = setupapi_add_phantom_dev(&hid_guid, io4_path);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    return S_OK;
 }
 
 static HRESULT io4_handle_irp(struct irp *irp)

platform/hwmon.c

@@ -26,15 +26,27 @@ static HANDLE hwmon_fd;
 
 HRESULT hwmon_hook_init(const struct hwmon_config *cfg)
 {
+    HRESULT hr;
+
     assert(cfg != NULL);
 
     if (!cfg->enable) {
         return S_FALSE;
     }
 
-    hwmon_fd = iohook_open_dummy_fd();
+    hr = iohook_open_nul_fd(&hwmon_fd);
 
-    return iohook_push_handler(hwmon_handle_irp);
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = iohook_push_handler(hwmon_handle_irp);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    return S_OK;
 }
 
 static HRESULT hwmon_handle_irp(struct irp *irp)

platform/nusec.c

@@ -139,7 +139,12 @@ HRESULT nusec_hook_init(
     nusec_nearfull = 0x00010200;
     nusec_play_count = 0;
     nusec_play_limit = 1024;
-    nusec_fd = iohook_open_dummy_fd();
+
+    hr = iohook_open_nul_fd(&nusec_fd);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
 
     hr = iohook_push_handler(nusec_handle_irp);