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authorDavid S. Miller <davem@sunset.davemloft.net>2007-07-27 22:31:46 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-30 00:27:33 -0700
commitc7f439b99efbea74c70a5531f92566db5a6731f2 (patch)
tree7053ceffa23d54670862e14d0bc2eec9d5d42427 /drivers/video/p9100.c
parenta0afaa6ab12cf696d170c22a8fdfd88c3e33555c (diff)
downloadop-kernel-dev-c7f439b99efbea74c70a5531f92566db5a6731f2.zip
op-kernel-dev-c7f439b99efbea74c70a5531f92566db5a6731f2.tar.gz
[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>
Diffstat (limited to 'drivers/video/p9100.c')
-rw-r--r--drivers/video/p9100.c138
1 files changed, 63 insertions, 75 deletions
diff --git a/drivers/video/p9100.c b/drivers/video/p9100.c
index 637b78b..5849606 100644
--- a/drivers/video/p9100.c
+++ b/drivers/video/p9100.c
@@ -255,107 +255,95 @@ static void p9100_init_fix(struct fb_info *info, int linebytes, struct device_no
info->fix.accel = FB_ACCEL_SUN_CGTHREE;
}
-struct all_info {
- struct fb_info info;
- struct p9100_par par;
-};
-
-static int __devinit p9100_init_one(struct of_device *op)
+static int __devinit p9100_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 p9100_par *par;
int linebytes, err;
- all = kzalloc(sizeof(*all), GFP_KERNEL);
- if (!all)
- return -ENOMEM;
+ info = framebuffer_alloc(sizeof(struct p9100_par), &op->dev);
+
+ err = -ENOMEM;
+ if (!info)
+ goto out_err;
+ par = info->par;
- spin_lock_init(&all->par.lock);
+ spin_lock_init(&par->lock);
/* This is the framebuffer and the only resource apps can mmap. */
- all->par.physbase = op->resource[2].start;
- all->par.which_io = op->resource[2].flags & IORESOURCE_BITS;
-
- sbusfb_fill_var(&all->info.var, dp->node, 8);
- all->info.var.red.length = 8;
- all->info.var.green.length = 8;
- all->info.var.blue.length = 8;
-
- linebytes = of_getintprop_default(dp, "linebytes",
- all->info.var.xres);
- all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres);
-
- all->par.regs = of_ioremap(&op->resource[0], 0,
- sizeof(struct p9100_regs), "p9100 regs");
- if (!all->par.regs) {
- kfree(all);
- return -ENOMEM;
- }
+ par->physbase = op->resource[2].start;
+ par->which_io = op->resource[2].flags & IORESOURCE_BITS;
- all->info.flags = FBINFO_DEFAULT;
- all->info.fbops = &p9100_ops;
- all->info.screen_base = of_ioremap(&op->resource[2], 0,
- all->par.fbsize, "p9100 ram");
- if (!all->info.screen_base) {
- of_iounmap(&op->resource[0],
- all->par.regs, sizeof(struct p9100_regs));
- kfree(all);
- return -ENOMEM;
- }
- all->info.par = &all->par;
+ sbusfb_fill_var(&info->var, dp->node, 8);
+ info->var.red.length = 8;
+ info->var.green.length = 8;
+ info->var.blue.length = 8;
- p9100_blank(0, &all->info);
+ linebytes = of_getintprop_default(dp, "linebytes", info->var.xres);
+ par->fbsize = PAGE_ALIGN(linebytes * info->var.yres);
- if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
- of_iounmap(&op->resource[0],
- all->par.regs, sizeof(struct p9100_regs));
- of_iounmap(&op->resource[2],
- all->info.screen_base, all->par.fbsize);
- kfree(all);
- return -ENOMEM;
- }
+ par->regs = of_ioremap(&op->resource[0], 0,
+ sizeof(struct p9100_regs), "p9100 regs");
+ if (!par->regs)
+ goto out_release_fb;
- p9100_init_fix(&all->info, linebytes, dp);
-
- err = register_framebuffer(&all->info);
- if (err < 0) {
- fb_dealloc_cmap(&all->info.cmap);
- of_iounmap(&op->resource[0],
- all->par.regs, sizeof(struct p9100_regs));
- of_iounmap(&op->resource[2],
- all->info.screen_base, all->par.fbsize);
- kfree(all);
- return err;
- }
- fb_set_cmap(&all->info.cmap, &all->info);
+ info->flags = FBINFO_DEFAULT;
+ info->fbops = &p9100_ops;
+ info->screen_base = of_ioremap(&op->resource[2], 0,
+ par->fbsize, "p9100 ram");
+ if (!info->screen_base)
+ goto out_unmap_regs;
+
+ p9100_blank(0, info);
+
+ if (fb_alloc_cmap(&info->cmap, 256, 0))
+ goto out_unmap_screen;
- dev_set_drvdata(&op->dev, all);
+ p9100_init_fix(info, linebytes, dp);
+
+ err = register_framebuffer(info);
+ if (err < 0)
+ goto out_dealloc_cmap;
+
+ fb_set_cmap(&info->cmap, info);
+
+ dev_set_drvdata(&op->dev, info);
printk("%s: p9100 at %lx:%lx\n",
dp->full_name,
- all->par.which_io, all->par.physbase);
+ par->which_io, par->physbase);
return 0;
-}
-static int __devinit p9100_probe(struct of_device *dev, const struct of_device_id *match)
-{
- struct of_device *op = to_of_device(&dev->dev);
+out_dealloc_cmap:
+ fb_dealloc_cmap(&info->cmap);
+
+out_unmap_screen:
+ of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
+
+out_unmap_regs:
+ of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
+
+out_release_fb:
+ framebuffer_release(info);
- return p9100_init_one(op);
+out_err:
+ return err;
}
static int __devexit p9100_remove(struct of_device *op)
{
- struct all_info *all = dev_get_drvdata(&op->dev);
+ struct fb_info *info = dev_get_drvdata(&op->dev);
+ struct p9100_par *par = info->par;
- unregister_framebuffer(&all->info);
- fb_dealloc_cmap(&all->info.cmap);
+ unregister_framebuffer(info);
+ fb_dealloc_cmap(&info->cmap);
- of_iounmap(&op->resource[0], all->par.regs, sizeof(struct p9100_regs));
- of_iounmap(&op->resource[2], all->info.screen_base, all->par.fbsize);
+ of_iounmap(&op->resource[0], par->regs, sizeof(struct p9100_regs));
+ of_iounmap(&op->resource[2], info->screen_base, par->fbsize);
- kfree(all);
+ framebuffer_release(info);
dev_set_drvdata(&op->dev, NULL);
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