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authorMing Lei <tom.leiming@gmail.com>2009-02-06 23:40:12 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 16:38:25 -0700
commit7a192ec334cab9fafe3a8665a65af398b0e24730 (patch)
treeeea572863500f94d446cfded69835e188dba3447 /drivers/video
parent6da2d377bba06c29d0bc41c8dee014164dec82a7 (diff)
platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver'
This patch fixes the bug reported in http://bugzilla.kernel.org/show_bug.cgi?id=11681. "Lots of device drivers register a 'struct device_driver' with the '.bus' member set to '&platform_bus_type'. This is wrong, since the platform_bus functions expect the 'struct device_driver' to be wrapped up in a 'struct platform_driver' which provides some additional callbacks (like suspend_late, resume_early). The effect may be that platform_suspend_late() uses bogus data outside the device_driver struct as a pointer pointer to the device driver's suspend_late() function or other hard to reproduce failures."(Lothar Wassmann) Signed-off-by: Ming Lei <tom.leiming@gmail.com> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/au1100fb.c31
-rw-r--r--drivers/video/au1200fb.c25
2 files changed, 30 insertions, 26 deletions
diff --git a/drivers/video/au1100fb.c b/drivers/video/au1100fb.c
index 62bd4441b5e0..378f27745a1d 100644
--- a/drivers/video/au1100fb.c
+++ b/drivers/video/au1100fb.c
@@ -457,7 +457,7 @@ static struct fb_ops au1100fb_ops =
/* AU1100 LCD controller device driver */
-static int __init au1100fb_drv_probe(struct device *dev)
+static int __init au1100fb_drv_probe(struct platform_device *dev)
{
struct au1100fb_device *fbdev = NULL;
struct resource *regs_res;
@@ -475,7 +475,7 @@ static int __init au1100fb_drv_probe(struct device *dev)
fbdev->panel = &known_lcd_panels[drv_info.panel_idx];
- dev_set_drvdata(dev, (void*)fbdev);
+ platform_set_drvdata(dev, (void *)fbdev);
/* Allocate region for our registers and map them */
if (!(regs_res = platform_get_resource(to_platform_device(dev),
@@ -583,19 +583,19 @@ failed:
fb_dealloc_cmap(&fbdev->info.cmap);
}
kfree(fbdev);
- dev_set_drvdata(dev, NULL);
+ platform_set_drvdata(dev, NULL);
return 0;
}
-int au1100fb_drv_remove(struct device *dev)
+int au1100fb_drv_remove(struct platform_device *dev)
{
struct au1100fb_device *fbdev = NULL;
if (!dev)
return -ENODEV;
- fbdev = (struct au1100fb_device*) dev_get_drvdata(dev);
+ fbdev = (struct au1100fb_device *) platform_get_drvdata(dev);
#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
@@ -620,9 +620,9 @@ int au1100fb_drv_remove(struct device *dev)
static u32 sys_clksrc;
static struct au1100fb_regs fbregs;
-int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
+int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
{
- struct au1100fb_device *fbdev = dev_get_drvdata(dev);
+ struct au1100fb_device *fbdev = platform_get_drvdata(dev);
if (!fbdev)
return 0;
@@ -641,9 +641,9 @@ int au1100fb_drv_suspend(struct device *dev, pm_message_t state)
return 0;
}
-int au1100fb_drv_resume(struct device *dev)
+int au1100fb_drv_resume(struct platform_device *dev)
{
- struct au1100fb_device *fbdev = dev_get_drvdata(dev);
+ struct au1100fb_device *fbdev = platform_get_drvdata(dev);
if (!fbdev)
return 0;
@@ -663,10 +663,11 @@ int au1100fb_drv_resume(struct device *dev)
#define au1100fb_drv_resume NULL
#endif
-static struct device_driver au1100fb_driver = {
- .name = "au1100-lcd",
- .bus = &platform_bus_type,
-
+static struct platform_driver au1100fb_driver = {
+ .driver = {
+ .name = "au1100-lcd",
+ .owner = THIS_MODULE,
+ },
.probe = au1100fb_drv_probe,
.remove = au1100fb_drv_remove,
.suspend = au1100fb_drv_suspend,
@@ -753,12 +754,12 @@ int __init au1100fb_init(void)
return ret;
}
- return driver_register(&au1100fb_driver);
+ return platform_driver_register(&au1100fb_driver);
}
void __exit au1100fb_cleanup(void)
{
- driver_unregister(&au1100fb_driver);
+ platform_driver_unregister(&au1100fb_driver);
kfree(drv_info.opt_mode);
}
diff --git a/drivers/video/au1200fb.c b/drivers/video/au1200fb.c
index 03e57ef88378..0d96f1d2d4c5 100644
--- a/drivers/video/au1200fb.c
+++ b/drivers/video/au1200fb.c
@@ -1622,7 +1622,7 @@ static int au1200fb_init_fbinfo(struct au1200fb_device *fbdev)
/* AU1200 LCD controller device driver */
-static int au1200fb_drv_probe(struct device *dev)
+static int au1200fb_drv_probe(struct platform_device *dev)
{
struct au1200fb_device *fbdev;
unsigned long page;
@@ -1645,7 +1645,7 @@ static int au1200fb_drv_probe(struct device *dev)
/* Allocate the framebuffer to the maximum screen size */
fbdev->fb_len = (win->w[plane].xres * win->w[plane].yres * bpp) / 8;
- fbdev->fb_mem = dma_alloc_noncoherent(dev,
+ fbdev->fb_mem = dma_alloc_noncoherent(&dev->dev,
PAGE_ALIGN(fbdev->fb_len),
&fbdev->fb_phys, GFP_KERNEL);
if (!fbdev->fb_mem) {
@@ -1715,7 +1715,7 @@ failed:
return ret;
}
-static int au1200fb_drv_remove(struct device *dev)
+static int au1200fb_drv_remove(struct platform_device *dev)
{
struct au1200fb_device *fbdev;
int plane;
@@ -1733,7 +1733,8 @@ static int au1200fb_drv_remove(struct device *dev)
/* Clean up all probe data */
unregister_framebuffer(&fbdev->fb_info);
if (fbdev->fb_mem)
- dma_free_noncoherent(dev, PAGE_ALIGN(fbdev->fb_len),
+ dma_free_noncoherent(&dev->dev,
+ PAGE_ALIGN(fbdev->fb_len),
fbdev->fb_mem, fbdev->fb_phys);
if (fbdev->fb_info.cmap.len != 0)
fb_dealloc_cmap(&fbdev->fb_info.cmap);
@@ -1747,22 +1748,24 @@ static int au1200fb_drv_remove(struct device *dev)
}
#ifdef CONFIG_PM
-static int au1200fb_drv_suspend(struct device *dev, u32 state, u32 level)
+static int au1200fb_drv_suspend(struct platform_device *dev, u32 state)
{
/* TODO */
return 0;
}
-static int au1200fb_drv_resume(struct device *dev, u32 level)
+static int au1200fb_drv_resume(struct platform_device *dev)
{
/* TODO */
return 0;
}
#endif /* CONFIG_PM */
-static struct device_driver au1200fb_driver = {
- .name = "au1200-lcd",
- .bus = &platform_bus_type,
+static struct platform_driver au1200fb_driver = {
+ .driver = {
+ .name = "au1200-lcd",
+ .owner = THIS_MODULE,
+ },
.probe = au1200fb_drv_probe,
.remove = au1200fb_drv_remove,
#ifdef CONFIG_PM
@@ -1906,12 +1909,12 @@ static int __init au1200fb_init(void)
printk(KERN_INFO "Power management device entry for the au1200fb loaded.\n");
#endif
- return driver_register(&au1200fb_driver);
+ return platform_driver_register(&au1200fb_driver);
}
static void __exit au1200fb_cleanup(void)
{
- driver_unregister(&au1200fb_driver);
+ platform_driver_unregister(&au1200fb_driver);
}
module_init(au1200fb_init);