Commit d97423ebab5ed4ea4e88e0b41c7c129b64022a4a
2023-06-18T12:19:54
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. (cherry picked from commit c6ee9780df4286f66c38f3fa9732daa9afe0a8a3)
diff --git a/src/hidapi/linux/hid.c b/src/hidapi/linux/hid.c
index cf857a6..063ba37 100644
--- a/src/hidapi/linux/hid.c
+++ b/src/hidapi/linux/hid.c
@@ -729,6 +729,8 @@ hid_device * hid_open(unsigned short vendor_id, unsigned short product_id, const
hid_device * HID_API_EXPORT hid_open_path(const char *path, int bExclusive)
{
+ const int MAX_ATTEMPTS = 10;
+ int attempt;
hid_device *dev = NULL;
hid_init();
@@ -736,7 +738,15 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path, int bExclusive)
dev = new_hid_device();
/* OPEN HERE */
- dev->device_handle = open(path, O_RDWR | O_CLOEXEC);
+ 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 we have a good handle, return it. */
if (dev->device_handle >= 0) {