[VIDEO]: Fix OOPS in all SBUS framebuffer drivers.
All of these drivers use a silly:
struct all_info {
struct fb_info info;
struct foo_par par;
};
struct all_info *all = kzalloc(sizeof(*all), GFP_KERNEL);
all->info.par = &all->par;
etc. etc. code sequence, basically replicating the provided
framebuffer_alloc()/framebuffer_release(), and doing it badly.
Not only is this massive code duplication, it also caused a
bug in that we weren't setting the fb_info->device pointer
which results in an OOPS when fb_is_primary_device() runs.
Fix all of this by using framebuffer_{alloc,release}() and
passing in "&of_device->dev" as the device pointer.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/video/bw2.c b/drivers/video/bw2.c
index b0b2e40..718b9f8 100644
--- a/drivers/video/bw2.c
+++ b/drivers/video/bw2.c
@@ -279,90 +279,91 @@
}
}
-struct all_info {
- struct fb_info info;
- struct bw2_par par;
-};
-
-static int __devinit bw2_init_one(struct of_device *op)
+static int __devinit bw2_probe(struct of_device *op, const struct of_device_id *match)
{
struct device_node *dp = op->node;
- struct all_info *all;
+ struct fb_info *info;
+ struct bw2_par *par;
int linebytes, err;
- all = kzalloc(sizeof(*all), GFP_KERNEL);
- if (!all)
- return -ENOMEM;
+ info = framebuffer_alloc(sizeof(struct bw2_par), &op->dev);
- spin_lock_init(&all->par.lock);
+ err = -ENOMEM;
+ if (!info)
+ goto out_err;
+ par = info->par;
- all->par.physbase = op->resource[0].start;
- all->par.which_io = op->resource[0].flags & IORESOURCE_BITS;
+ spin_lock_init(&par->lock);
- sbusfb_fill_var(&all->info.var, dp->node, 1);
+ par->physbase = op->resource[0].start;
+ par->which_io = op->resource[0].flags & IORESOURCE_BITS;
+
+ sbusfb_fill_var(&info->var, dp->node, 1);
linebytes = of_getintprop_default(dp, "linebytes",
- all->info.var.xres);
+ info->var.xres);
- all->info.var.red.length = all->info.var.green.length =
- all->info.var.blue.length = all->info.var.bits_per_pixel;
- all->info.var.red.offset = all->info.var.green.offset =
- all->info.var.blue.offset = 0;
+ info->var.red.length = info->var.green.length =
+ info->var.blue.length = info->var.bits_per_pixel;
+ info->var.red.offset = info->var.green.offset =
+ info->var.blue.offset = 0;
- all->par.regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
- sizeof(struct bw2_regs), "bw2 regs");
+ par->regs = of_ioremap(&op->resource[0], BWTWO_REGISTER_OFFSET,
+ sizeof(struct bw2_regs), "bw2 regs");
+ if (!par->regs)
+ goto out_release_fb;
if (!of_find_property(dp, "width", NULL))
- bw2_do_default_mode(&all->par, &all->info, &linebytes);
+ bw2_do_default_mode(par, info, &linebytes);
- all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
+ par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
- all->info.flags = FBINFO_DEFAULT;
- all->info.fbops = &bw2_ops;
+ info->flags = FBINFO_DEFAULT;
+ info->fbops = &bw2_ops;
- all->info.screen_base =
- of_ioremap(&op->resource[0], 0, all->par.fbsize, "bw2 ram");
- all->info.par = &all->par;
+ info->screen_base = of_ioremap(&op->resource[0], 0,
+ par->fbsize, "bw2 ram");
+ if (!info->screen_base)
+ goto out_unmap_regs;
- bw2_blank(0, &all->info);
+ bw2_blank(0, info);
- bw2_init_fix(&all->info, linebytes);
+ bw2_init_fix(info, linebytes);
- err= register_framebuffer(&all->info);
- if (err < 0) {
- of_iounmap(&op->resource[0],
- all->par.regs, sizeof(struct bw2_regs));
- of_iounmap(&op->resource[0],
- all->info.screen_base, all->par.fbsize);
- kfree(all);
- return err;
- }
+ err = register_framebuffer(info);
+ if (err < 0)
+ goto out_unmap_screen;
- dev_set_drvdata(&op->dev, all);
+ dev_set_drvdata(&op->dev, info);
printk("%s: bwtwo at %lx:%lx\n",
- dp->full_name,
- all->par.which_io, all->par.physbase);
+ dp->full_name, par->which_io, par->physbase);
return 0;
-}
-static int __devinit bw2_probe(struct of_device *dev, const struct of_device_id *match)
-{
- struct of_device *op = to_of_device(&dev->dev);
+out_unmap_screen:
+ of_iounmap(&op->resource[0], info->screen_base, par->fbsize);
- return bw2_init_one(op);
+out_unmap_regs:
+ of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+
+out_release_fb:
+ framebuffer_release(info);
+
+out_err:
+ return err;
}
static int __devexit bw2_remove(struct of_device *op)
{
- struct all_info *all = dev_get_drvdata(&op->dev);
+ struct fb_info *info = dev_get_drvdata(&op->dev);
+ struct bw2_par *par = info->par;
- unregister_framebuffer(&all->info);
+ unregister_framebuffer(info);
- of_iounmap(&op->resource[0], all->par.regs, sizeof(struct bw2_regs));
- of_iounmap(&op->resource[0], all->info.screen_base, all->par.fbsize);
+ of_iounmap(&op->resource[0], par->regs, sizeof(struct bw2_regs));
+ of_iounmap(&op->resource[0], info->screen_base, par->fbsize);
- kfree(all);
+ framebuffer_release(info);
dev_set_drvdata(&op->dev, NULL);