Commit cae8a12f authored by Thomas Koeller's avatar Thomas Koeller Committed by Linus Torvalds
Browse files

[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
......@@ -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);
......
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