0b5d87fd30
As usual, this patches were taken (and rebased) from https://github.com/raspberrypi/linux/commits/rpi-4.1.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 46853
45 lines
1.3 KiB
Diff
45 lines
1.3 KiB
Diff
From 4e5881da660ecbdb759d1730defdc091999b1893 Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Fri, 26 Jun 2015 17:37:38 +0100
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Subject: [PATCH 083/171] bcm2708-vcio: Remove restriction of only a single
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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).
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Locking should be handled on each mailbox access
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---
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drivers/mailbox/bcm2708-vcio.c | 14 --------------
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1 file changed, 14 deletions(-)
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--- a/drivers/mailbox/bcm2708-vcio.c
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+++ b/drivers/mailbox/bcm2708-vcio.c
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@@ -242,20 +242,9 @@ EXPORT_SYMBOL_GPL(bcm_mailbox_property);
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/* Platform Device for Mailbox */
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-/*
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- * Is the device open right now? Used to prevent
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- * concurent access into the same device
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- */
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-static bool device_is_open;
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-
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/* This is called whenever a process attempts to open the device file */
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static int device_open(struct inode *inode, struct file *file)
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{
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- /* We don't want to talk to two processes at the same time */
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- if (device_is_open)
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- return -EBUSY;
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-
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- device_is_open = true;
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try_module_get(THIS_MODULE);
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return 0;
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@@ -263,9 +252,6 @@ static int device_open(struct inode *ino
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static int device_release(struct inode *inode, struct file *file)
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{
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- /* We're now ready for our next caller */
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- device_is_open = false;
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-
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module_put(THIS_MODULE);
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return 0;
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