Skip to content

M
Mock Turtle
Commit 34b218e8 authored by Federico Vaga's avatar Federico Vaga
Browse files
Options

kernel: fix critical section 

Signed-off-by: 's avatarFederico Vaga <federico.vaga@gmail.com>
parent ad8c6ca7
Hide whitespace changes
Inline Side-by-side
Showing with 5 additions and 3 deletions
kernel/wrnc-core.c
View file @ 34b218e8
......@@ -981,13 +981,15 @@ static int wrnc_ioctl_msg_sync(struct wrnc_hmq *hmq, void __user *uarg)
/*
* Wait until the message queue is empty so we can safely enqueue
* the synchronous message. Then get the mutex to avoid other process
* to write
* the synchronous message. Get the mutex to avoid other process
* to write while we are waiting to empty the list.
* Sync messages does not have higher priority than the others, so
* we'll wait here until is our turn
*/
mutex_lock(&hmq->mtx);
to = wait_event_interruptible(hmq->q_msg, list_empty(&hmq->list_msg));
if (unlikely(to < 0))
goto out;
mutex_lock(&hmq->mtx);
/*
* Wait for the CPU-out queue is empty. Then get the mutex to avoid
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment