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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/mtd
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/mtd')
-rw-r--r--drivers/mtd/maps/pxa2xx-flash.c37
-rw-r--r--drivers/mtd/nand/excite_nandflash.c25
-rw-r--r--drivers/mtd/onenand/generic.c26
3 files changed, 45 insertions, 43 deletions
diff --git a/drivers/mtd/maps/pxa2xx-flash.c b/drivers/mtd/maps/pxa2xx-flash.c
index 771139c5bf87..e9026cb1c5b2 100644
--- a/drivers/mtd/maps/pxa2xx-flash.c
+++ b/drivers/mtd/maps/pxa2xx-flash.c
@@ -41,9 +41,8 @@ struct pxa2xx_flash_info {
static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
-static int __init pxa2xx_flash_probe(struct device *dev)
+static int __init pxa2xx_flash_probe(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(dev);
struct flash_platform_data *flash = pdev->dev.platform_data;
struct pxa2xx_flash_info *info;
struct mtd_partition *parts;
@@ -114,15 +113,15 @@ static int __init pxa2xx_flash_probe(struct device *dev)
add_mtd_device(info->mtd);
}
- dev_set_drvdata(dev, info);
+ platform_set_drvdata(pdev, info);
return 0;
}
-static int __exit pxa2xx_flash_remove(struct device *dev)
+static int __exit pxa2xx_flash_remove(struct platform_device *dev)
{
- struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+ struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
- dev_set_drvdata(dev, NULL);
+ platform_set_drvdata(dev, NULL);
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts)
@@ -141,9 +140,9 @@ static int __exit pxa2xx_flash_remove(struct device *dev)
}
#ifdef CONFIG_PM
-static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state)
+static int pxa2xx_flash_suspend(struct platform_device *dev, pm_message_t state)
{
- struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+ struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
int ret = 0;
if (info->mtd && info->mtd->suspend)
@@ -151,17 +150,17 @@ static int pxa2xx_flash_suspend(struct device *dev, pm_message_t state)
return ret;
}
-static int pxa2xx_flash_resume(struct device *dev)
+static int pxa2xx_flash_resume(struct platform_device *dev)
{
- struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+ struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
if (info->mtd && info->mtd->resume)
info->mtd->resume(info->mtd);
return 0;
}
-static void pxa2xx_flash_shutdown(struct device *dev)
+static void pxa2xx_flash_shutdown(struct platform_device *dev)
{
- struct pxa2xx_flash_info *info = dev_get_drvdata(dev);
+ struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
if (info && info->mtd->suspend(info->mtd) == 0)
info->mtd->resume(info->mtd);
@@ -172,11 +171,13 @@ static void pxa2xx_flash_shutdown(struct device *dev)
#define pxa2xx_flash_shutdown NULL
#endif
-static struct device_driver pxa2xx_flash_driver = {
- .name = "pxa2xx-flash",
- .bus = &platform_bus_type,
+static struct platform_driver pxa2xx_flash_driver = {
+ .driver = {
+ .name = "pxa2xx-flash",
+ .owner = THIS_MODULE,
+ },
.probe = pxa2xx_flash_probe,
- .remove = __exit_p(pxa2xx_flash_remove),
+ .remove = __devexit_p(pxa2xx_flash_remove),
.suspend = pxa2xx_flash_suspend,
.resume = pxa2xx_flash_resume,
.shutdown = pxa2xx_flash_shutdown,
@@ -184,12 +185,12 @@ static struct device_driver pxa2xx_flash_driver = {
static int __init init_pxa2xx_flash(void)
{
- return driver_register(&pxa2xx_flash_driver);
+ return platform_driver_register(&pxa2xx_flash_driver);
}
static void __exit cleanup_pxa2xx_flash(void)
{
- driver_unregister(&pxa2xx_flash_driver);
+ platform_driver_unregister(&pxa2xx_flash_driver);
}
module_init(init_pxa2xx_flash);
diff --git a/drivers/mtd/nand/excite_nandflash.c b/drivers/mtd/nand/excite_nandflash.c
index ced14b5294d5..72446fb48d4b 100644
--- a/drivers/mtd/nand/excite_nandflash.c
+++ b/drivers/mtd/nand/excite_nandflash.c
@@ -128,11 +128,11 @@ static int excite_nand_devready(struct mtd_info *mtd)
* The binding to the mtd and all allocated
* resources are released.
*/
-static int __exit excite_nand_remove(struct device *dev)
+static int __exit excite_nand_remove(struct platform_device *dev)
{
- struct excite_nand_drvdata * const this = dev_get_drvdata(dev);
+ struct excite_nand_drvdata * const this = platform_get_drvdata(dev);
- dev_set_drvdata(dev, NULL);
+ platform_set_drvdata(dev, NULL);
if (unlikely(!this)) {
printk(KERN_ERR "%s: called %s without private data!!",
@@ -159,9 +159,8 @@ static int __exit excite_nand_remove(struct device *dev)
* it can allocate all necessary resources then calls the
* nand layer to look for devices.
*/
-static int __init excite_nand_probe(struct device *dev)
+static int __init excite_nand_probe(struct platform_device *pdev)
{
- struct platform_device * const pdev = to_platform_device(dev);
struct excite_nand_drvdata *drvdata; /* private driver data */
struct nand_chip *board_chip; /* private flash chip data */
struct mtd_info *board_mtd; /* mtd info for this board */
@@ -175,7 +174,7 @@ static int __init excite_nand_probe(struct device *dev)
}
/* bind private data into driver */
- dev_set_drvdata(dev, drvdata);
+ platform_set_drvdata(pdev, drvdata);
/* allocate and map the resource */
drvdata->regs =
@@ -219,23 +218,25 @@ static int __init excite_nand_probe(struct device *dev)
return 0;
}
-static struct device_driver excite_nand_driver = {
- .name = "excite_nand",
- .bus = &platform_bus_type,
+static struct platform_driver excite_nand_driver = {
+ .driver = {
+ .name = "excite_nand",
+ .owner = THIS_MODULE,
+ },
.probe = excite_nand_probe,
- .remove = __exit_p(excite_nand_remove)
+ .remove = __devexit_p(excite_nand_remove)
};
static int __init excite_nand_init(void)
{
pr_info("Basler eXcite nand flash driver Version "
EXCITE_NANDFLASH_VERSION "\n");
- return driver_register(&excite_nand_driver);
+ return platform_driver_register(&excite_nand_driver);
}
static void __exit excite_nand_exit(void)
{
- driver_unregister(&excite_nand_driver);
+ platform_driver_unregister(&excite_nand_driver);
}
module_init(excite_nand_init);
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
index 5b69e7773c6c..3a496c33fb52 100644
--- a/drivers/mtd/onenand/generic.c
+++ b/drivers/mtd/onenand/generic.c
@@ -36,10 +36,9 @@ struct onenand_info {
struct onenand_chip onenand;
};
-static int __devinit generic_onenand_probe(struct device *dev)
+static int __devinit generic_onenand_probe(struct platform_device *pdev)
{
struct onenand_info *info;
- struct platform_device *pdev = to_platform_device(dev);
struct flash_platform_data *pdata = pdev->dev.platform_data;
struct resource *res = pdev->resource;
unsigned long size = res->end - res->start + 1;
@@ -49,7 +48,7 @@ static int __devinit generic_onenand_probe(struct device *dev)
if (!info)
return -ENOMEM;
- if (!request_mem_region(res->start, size, dev->driver->name)) {
+ if (!request_mem_region(res->start, size, pdev->dev.driver->name)) {
err = -EBUSY;
goto out_free_info;
}
@@ -82,7 +81,7 @@ static int __devinit generic_onenand_probe(struct device *dev)
#endif
err = add_mtd_device(&info->mtd);
- dev_set_drvdata(&pdev->dev, info);
+ platform_set_drvdata(pdev, info);
return 0;
@@ -96,14 +95,13 @@ out_free_info:
return err;
}
-static int __devexit generic_onenand_remove(struct device *dev)
+static int __devexit generic_onenand_remove(struct platform_device *pdev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct onenand_info *info = dev_get_drvdata(&pdev->dev);
+ struct onenand_info *info = platform_get_drvdata(pdev);
struct resource *res = pdev->resource;
unsigned long size = res->end - res->start + 1;
- dev_set_drvdata(&pdev->dev, NULL);
+ platform_set_drvdata(pdev, NULL);
if (info) {
if (info->parts)
@@ -120,9 +118,11 @@ static int __devexit generic_onenand_remove(struct device *dev)
return 0;
}
-static struct device_driver generic_onenand_driver = {
- .name = DRIVER_NAME,
- .bus = &platform_bus_type,
+static struct platform_driver generic_onenand_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
.probe = generic_onenand_probe,
.remove = __devexit_p(generic_onenand_remove),
};
@@ -131,12 +131,12 @@ MODULE_ALIAS(DRIVER_NAME);
static int __init generic_onenand_init(void)
{
- return driver_register(&generic_onenand_driver);
+ return platform_driver_register(&generic_onenand_driver);
}
static void __exit generic_onenand_exit(void)
{
- driver_unregister(&generic_onenand_driver);
+ platform_driver_unregister(&generic_onenand_driver);
}
module_init(generic_onenand_init);