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bcm2708-vcio: Remove restriction of only a single instance being open

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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
This commit is contained in:
popcornmix
2015-06-26 17:37:38 +01:00
parent 447a45ed39
commit 95b6e288aa
1 changed files with 0 additions and 14 deletions
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14
drivers/mailbox/bcm2708-vcio.c
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@@ -242,20 +242,9 @@ EXPORT_SYMBOL_GPL(bcm_mailbox_property);
/* Platform Device for Mailbox */ /* 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 */ /* This is called whenever a process attempts to open the device file */
static int device_open(struct inode *inode, struct file *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); try_module_get(THIS_MODULE);
return 0; return 0;
@@ -263,9 +252,6 @@ static int device_open(struct inode *inode, struct file *file)
static int device_release(struct inode *inode, struct file *file) 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); module_put(THIS_MODULE);
return 0; return 0;