Generation: Explicitly release semaphore on disconnect

This prevents any lockups when querying another request.

Signed-off-by: kingbri <bdashore3@proton.me>

main.py

@@ -34,7 +34,11 @@ from common.config import (
     get_lora_config,
     get_network_config,
 )
-from common.generators import call_with_semaphore, generate_with_semaphore
+from common.generators import (
+    call_with_semaphore,
+    generate_with_semaphore,
+    release_semaphore,
+)
 from common.sampling import (
     get_sampler_overrides,
     set_overrides_from_file,
@@ -236,6 +240,7 @@ async def load_model(request: Request, data: ModelLoadRequest):
             for module, modules in load_status:
                 # Get out if the request gets disconnected
                 if await request.is_disconnected():
+                    release_semaphore()
                     logger.error(
                         "Model load cancelled by user. "
                         "Please make sure to run unload to free up resources."
@@ -522,6 +527,7 @@ async def generate_completion(request: Request, data: CompletionRequest):
                 for generation in new_generation:
                     # Get out if the request gets disconnected
                     if await request.is_disconnected():
+                        release_semaphore()
                         logger.error("Completion generation cancelled by user.")
                         return
 
@@ -620,6 +626,7 @@ async def generate_chat_completion(request: Request, data: ChatCompletionRequest
                 for generation in new_generation:
                     # Get out if the request gets disconnected
                     if await request.is_disconnected():
+                        release_semaphore()
                         logger.error("Chat completion generation cancelled by user.")
                         return