Changeset 4e44f5d in mainline

Timestamp:

2018-01-16T23:52:18Z (6 years ago)

Author:

Petr Manek <petr.manek@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3f44312

Parents:

338729c

Message:

usbdev: protect against flag race

File:

• uspace/lib/usbdev/src/devpoll.c (modified) (2 diffs)

uspace/lib/usbdev/src/devpoll.c

@@ -107 +107 @@
         assert(arg);
         usb_polling_t *polling = arg;
+
+        fibril_mutex_lock(&polling->guard);
         polling->running = true;
+        fibril_mutex_unlock(&polling->guard);
 
         usb_pipe_t *pipe = &polling->ep_mapping->pipe;
@@ -208 +211 @@
         }
 
+        fibril_mutex_lock(&polling->guard);
         polling->running = false;
+        fibril_mutex_unlock(&polling->guard);
 
         /* Notify joiners, if any. */