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Fixed DualSense controllers not being picked up by the HIDAPI driver

The hidraw device may take additional time to get the correct permissions for us to open it. In my tests on Steam Deck hardware, this ranges between 5-8ms.
Sam Lantinga před 3 roky
rodič
revize
c6ee9780df
1 změnil soubory, kde provedl 11 přidání a 1 odebrání
  1. 11 1
      src/hidapi/linux/hid.c

+ 11 - 1
src/hidapi/linux/hid.c

@@ -1096,7 +1096,17 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path)
 		return NULL;
 		return NULL;
 	}
 	}
 
 
-	dev->device_handle = open(path, O_RDWR | O_CLOEXEC);
+    const int MAX_ATTEMPTS = 10;
+    int attempt;
+    for (attempt = 1; attempt <= MAX_ATTEMPTS; ++attempt) {
+        dev->device_handle = open(path, O_RDWR | O_CLOEXEC);
+        if (dev->device_handle < 0 && errno == EACCES) {
+            /* udev might be setting up permissions, wait a bit and try again */
+            usleep(1 * 1000);
+            continue;
+        }
+        break;
+    }
 
 
 	if (dev->device_handle >= 0) {
 	if (dev->device_handle >= 0) {
 		int res, desc_size = 0;
 		int res, desc_size = 0;