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[PATCH] non-linear frame buffer read/write access

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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: Thomas Koeller <thomas@koeller.dyndns.org>
Acked-by: "Antonino A. Daplas" <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Thomas Koeller 2006-01-09 20:53:48 -08:00 committed by Linus Torvalds
parent 74b4f04231
commit cae8a12f49
1 changed files with 2 additions and 3 deletions
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5
drivers/video/fbmem.c
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@ -1234,6 +1234,7 @@ fb_open(struct inode *inode, struct file *file)
return -ENODEV; return -ENODEV;
if (!try_module_get(info->fbops->owner)) if (!try_module_get(info->fbops->owner))
return -ENODEV; return -ENODEV;
file->private_data = info;
if (info->fbops->fb_open) { if (info->fbops->fb_open) {
res = info->fbops->fb_open(info,1); res = info->fbops->fb_open(info,1);
if (res) if (res)
@ -1245,11 +1246,9 @@ fb_open(struct inode *inode, struct file *file)
static int static int
fb_release(struct inode *inode, struct file *file) fb_release(struct inode *inode, struct file *file)
{ {
int fbidx = iminor(inode); struct fb_info * const info = file->private_data;
struct fb_info *info;
lock_kernel(); lock_kernel();
info = registered_fb[fbidx];
if (info->fbops->fb_release) if (info->fbops->fb_release)
info->fbops->fb_release(info,1); info->fbops->fb_release(info,1);
module_put(info->fbops->owner); module_put(info->fbops->owner);