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of: Add function for generating a DT modalias with a newline 

The modalias sysfs attr is lacking a newline for DT aliases on platform
devices. The macio and ibmebus correctly add the newline, but open code it.
Introduce a new function, of_device_modalias(), that fills the buffer with
the modalias including the newline and update users of the old
of_device_get_modalias function.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring 2017-03-22 09:16:27 -05:00
parent bcf54d5385
commit 0634c29589
7 changed files with 24 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/platforms/pseries/ibmebus.c
View File

@ -410,10 +410,7 @@ static ssize_t name_show(struct device *dev,
static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
buf[len] = '\n';
buf[len+1] = 0;
return len+1;
return of_device_modalias(dev, buf, PAGE_SIZE);
}
static struct device_attribute ibmebus_bus_device_attrs[] = {

2
drivers/base/platform.c
View File

@ -847,7 +847,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
struct platform_device *pdev = to_platform_device(dev);
int len;
len = of_device_get_modalias(dev, buf, PAGE_SIZE -1);
len = of_device_modalias(dev, buf, PAGE_SIZE);
if (len != -ENODEV)
return len;

7
drivers/macintosh/macio_sysfs.c
View File

@ -41,12 +41,7 @@ compatible_show (struct device *dev, struct device_attribute *attr, char *buf)
static ssize_t modalias_show (struct device *dev, struct device_attribute *attr,
char *buf)
{
int len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
buf[len] = '\n';
buf[len+1] = 0;
return len+1;
return of_device_modalias(dev, buf, PAGE_SIZE);
}
static ssize_t devspec_show(struct device *dev,

18
drivers/of/device.c
View File

@ -176,7 +176,7 @@ const void *of_device_get_match_data(const struct device *dev)
}
EXPORT_SYMBOL(of_device_get_match_data);
ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
{
const char *compat;
int cplen, i;
@ -225,7 +225,6 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
return repend;
}
EXPORT_SYMBOL_GPL(of_device_get_modalias);
int of_device_request_module(struct device *dev)
{
@ -250,6 +249,21 @@ int of_device_request_module(struct device *dev)
}
EXPORT_SYMBOL_GPL(of_device_request_module);
/**
* of_device_modalias - Fill buffer with newline terminated modalias string
*/
ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
{
ssize_t sl = of_device_get_modalias(dev, str, len - 2);
if (sl < 0)
return sl;
str[sl++] = '\n';
str[sl] = 0;
return sl;
}
EXPORT_SYMBOL_GPL(of_device_modalias);
/**
* of_device_uevent - Display OF related uevent information
*/

5
drivers/tty/serdev/core.c
View File

@ -191,10 +191,7 @@ static int serdev_drv_remove(struct device *dev)
static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2);
buf[len] = '\n';
buf[len+1] = 0;
return len+1;
return of_device_modalias(dev, buf, PAGE_SIZE);
}
static struct device_attribute serdev_device_attrs[] = {

2
drivers/usb/common/ulpi.c
View File

@ -107,7 +107,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
int len;
struct ulpi *ulpi = to_ulpi_dev(dev);
len = of_device_get_modalias(dev, buf, PAGE_SIZE - 1);
len = of_device_modalias(dev, buf, PAGE_SIZE);
if (len != -ENODEV)
return len;

7
include/linux/of_device.h
View File

@ -34,8 +34,7 @@ extern void of_device_unregister(struct platform_device *ofdev);
extern const void *of_device_get_match_data(const struct device *dev);
extern ssize_t of_device_get_modalias(struct device *dev,
char *str, ssize_t len);
extern ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len);
extern int of_device_request_module(struct device *dev);
extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
@ -72,8 +71,8 @@ static inline const void *of_device_get_match_data(const struct device *dev)
return NULL;
}
static inline int of_device_get_modalias(struct device *dev,
char *str, ssize_t len)
static inline int of_device_modalias(struct device *dev,
char *str, ssize_t len)
{
return -ENODEV;
}