video: pxa3xx-gcu: provide an empty .open call
PATCH 3/4 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 <[email protected]>
--- drivers/video/pxa3xx-gcu.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
drivers/video/pxa3xx-gcu.c +10 -0
@@ -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,
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1.8.5.3