From 3437b2b83f3bdb99ae4ffc2fd1e1608d6e06fffe Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Wed, 5 Mar 2014 17:12:48 +0100 Subject: [PATCH] video: pxa3xx-gcu: provide an empty .open call This is necessary in order to make the core set file->private_data to miscdev in use. We need that information later to dereference the container of the device, so we can get access to our private struct from other callbacks. Signed-off-by: Daniel Mack Acked-by: Haojian Zhuang Signed-off-by: Tomi Valkeinen --- drivers/video/pxa3xx-gcu.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/video/pxa3xx-gcu.c b/drivers/video/pxa3xx-gcu.c index f9961ba91430..73c29ecf080f 100644 --- a/drivers/video/pxa3xx-gcu.c +++ b/drivers/video/pxa3xx-gcu.c @@ -373,6 +373,15 @@ static inline struct pxa3xx_gcu_priv *to_pxa3xx_gcu_priv(struct file *file) return container_of(dev, struct pxa3xx_gcu_priv, misc_dev); } +/* + * provide an empty .open callback, so the core sets file->private_data + * for us. + */ +static int pxa3xx_gcu_open(struct inode *inode, struct file *file) +{ + return 0; +} + static ssize_t pxa3xx_gcu_write(struct file *file, const char *buff, size_t count, loff_t *offp) @@ -571,6 +580,7 @@ pxa3xx_gcu_free_buffers(struct device *dev, static const struct file_operations pxa3xx_gcu_miscdev_fops = { .owner = THIS_MODULE, + .open = pxa3xx_gcu_open, .write = pxa3xx_gcu_write, .unlocked_ioctl = pxa3xx_gcu_ioctl, .mmap = pxa3xx_gcu_mmap, -- 2.20.1