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Commit cae8a12f authored by Thomas Koeller's avatar Thomas Koeller Committed by Linus Torvalds
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[PATCH] non-linear frame buffer read/write access 



While the code in fbmem.c allows for hooking read/write access to
non-linear frame buffers by means of fb_read and fb_write in struct fb_ops,
I could not find a way tho access the actual frame buffer memory from
within these routines.  I therefore had to patch fbmem.c, to be able to
retrieve a pointer to struct fb_info from the 'file' argument to these
functions.

The second hunk of the patch is not strictly required, I only did that for
symmetry reasons (and the code is somewhat shorter).

Signed-off-by: default avatarThomas Koeller <thomas@koeller.dyndns.org>
Acked-by: default avatar"Antonino A. Daplas" <adaplas@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 74b4f042

drivers/video/fbmem.c

+2 −3
Original line number Diff line number Diff line
@@ -1234,6 +1234,7 @@ fb_open(struct inode *inode, struct file *file) 
		return -ENODEV;

	if (!try_module_get(info->fbops->owner))

		return -ENODEV;

	file->private_data = info;

	if (info->fbops->fb_open) {

		res = info->fbops->fb_open(info,1);

		if (res)
@@ -1245,11 +1246,9 @@ fb_open(struct inode *inode, struct file *file) 
static int 

fb_release(struct inode *inode, struct file *file)

{

	int fbidx = iminor(inode);

	struct fb_info *info;

	struct fb_info * const info = file->private_data;



	lock_kernel();

	info = registered_fb[fbidx];

	if (info->fbops->fb_release)

		info->fbops->fb_release(info,1);

	module_put(info->fbops->owner);