Fix iokit_get_string_descriptor_ascii by returning the size of the string

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libirecovery.c b/src/libirecovery.c
index d80d8cc..9284316 100644
--- a/src/libirecovery.c
+++ b/src/libirecovery.c
@@ -249,6 +249,7 @@ static int iokit_get_string_descriptor_ascii(irecv_client_t client, uint8_t desc
         request.wIndex = 0; // All languages 0x409; // language
         request.wLength = sizeof(descriptor) - 1;
         request.pData = descriptor;
+        request.wLenDone = 0;
 
         result = (*client->handle)->DeviceRequest(client->handle, &request);
         if (result == kIOReturnNoDevice)
@@ -262,6 +263,7 @@ static int iokit_get_string_descriptor_ascii(irecv_client_t client, uint8_t desc
 
                 request.wValue = (kUSBStringDesc << 8) | desc_index;
                 request.wIndex = descriptor[2] + (descriptor[3] << 8);
+                request.wLenDone = 0;
                 result = (*client->handle)->DeviceRequest(client->handle, &request);
 
                 if (result == kIOReturnNoDevice)
@@ -277,7 +279,7 @@ static int iokit_get_string_descriptor_ascii(irecv_client_t client, uint8_t desc
                 }
                 buffer[j] = 0;
 
-                return IRECV_E_SUCCESS;
+                return request.wLenDone;
         }
         return IRECV_E_UNKNOWN_ERROR;
 }