[PATCH 37/75] Driver core: Make platform_device.id an int

Greg Kroah-Hartman
2007-10-12T22:40:19Z

From: Jean Delvare <khali@linux-fr.org>

While platform_device.id is a u32, platform_device_add() handles "-1"
as a special id value. This has potential for confusion and bugs.
Making it an int instead should prevent problems from happening in
the future.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/base/platform.c | 7 ++++---
include/linux/platform_device.h | 7 ++++---
2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index a2e3910..fb56092 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -161,7 +161,7 @@ static void platform_device_release(struct device *dev)
* Create a platform device object which can have other objects attached
* to it, and which will have attached objects freed when it is released.
*/
-struct platform_device *platform_device_alloc(const char *name, unsigned int id)
+struct platform_device *platform_device_alloc(const char *name, int id)
{
struct platform_object *pa;

@@ -245,7 +245,8 @@ int platform_device_add(struct platform_device *pdev)
pdev->dev.bus = &platform_bus_type;

if (pdev->id != -1)
- snprintf(pdev->dev.bus_id, BUS_ID_SIZE, "%s.%u", pdev->name, pdev->id);
+ snprintf(pdev->dev.bus_id, BUS_ID_SIZE, "%s.%d", pdev->name,
+ pdev->id);
else
strlcpy(pdev->dev.bus_id, pdev->name, BUS_ID_SIZE);

@@ -359,7 +360,7 @@ EXPORT_SYMBOL_GPL(platform_device_unregister);
* the Linux driver model. In particular, when such drivers are built
* as modules, they can't be "hotplugged".
*/
-struct platform_device *platform_device_register_simple(char *name, unsigned int id,
+struct platform_device *platform_device_register_simple(char *name, int id,
struct resource *res, unsigned int num)
{
struct platform_device *pdev;
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 8bbd459..e808043 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -15,7 +15,7 @@

struct platform_device {
const char * name;
- u32 id;
+ int id;
struct device dev;
u32 num_resources;
struct resource * resource;
@@ -35,9 +35,10 @@ extern struct resource *platform_get_resource_byname(struct platform_device *, u
extern int platform_get_irq_byname(struct platform_device *, char *);
extern int platform_add_devices(struct platform_device **, int);

-extern struct platform_device *platform_device_register_simple(char *, unsigned int, struct resource *, unsigned int);
+extern struct platform_device *platform_device_register_simple(char *, int id,
+ struct resource *, unsigned int);

-extern struct platform_device *platform_device_alloc(const char *name, unsigned int id);
+extern struct platform_device *platform_device_alloc(const char *name, int id);
extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size);
extern int platform_device_add(struct platform_device *pdev);
--
1.5.3.4