From f789239f3014997243c1f46e74c7f653d3826503 Mon Sep 17 00:00:00 2001 From: popcornmix Date: Fri, 26 Jun 2015 17:37:38 +0100 Subject: [PATCH 083/203] 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;