blob: ad169da35ddc3a1cc8d895dfc62b751fb6b16728 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
From 79796a03fa8311ea9030817db27690f24f72214c Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Fri, 26 Jun 2015 17:37:38 +0100
Subject: [PATCH 083/121] bcm2708-vcio: Remove restriction of only a single
instance being open
We need more than one process to be able to use mailbox interface (e.g. HW cursor in fbturbo and hello_fft).
Locking should be handled on each mailbox access
---
drivers/mailbox/bcm2708-vcio.c | 14 --------------
1 file changed, 14 deletions(-)
--- a/drivers/mailbox/bcm2708-vcio.c
+++ b/drivers/mailbox/bcm2708-vcio.c
@@ -242,20 +242,9 @@ EXPORT_SYMBOL_GPL(bcm_mailbox_property);
/* Platform Device for Mailbox */
-/*
- * Is the device open right now? Used to prevent
- * concurent access into the same device
- */
-static bool device_is_open;
-
/* This is called whenever a process attempts to open the device file */
static int device_open(struct inode *inode, struct file *file)
{
- /* We don't want to talk to two processes at the same time */
- if (device_is_open)
- return -EBUSY;
-
- device_is_open = true;
try_module_get(THIS_MODULE);
return 0;
@@ -263,9 +252,6 @@ static int device_open(struct inode *ino
static int device_release(struct inode *inode, struct file *file)
{
- /* We're now ready for our next caller */
- device_is_open = false;
-
module_put(THIS_MODULE);
return 0;
|
