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platform: prefix MODALIAS with "platform:"

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Prefix platform modalias strings with "platform:", which
modprobe config to blacklist alias resolving if userspace
configures it.

Send uevents for all platform devices.

Add MODULE_ALIAS's to: pxa2xx_pcmcia, ds1742 and pcspkr to trigger
module autoloading by userspace.

  $ modinfo pcspkr
  alias:          platform:pcspkr
  license:        GPL
  description:    PC Speaker beeper driver
  ...

  $ modprobe -n -v platform:pcspkr
  insmod /lib/modules/2.6.23-rc3-g28e8351a-dirty/kernel/drivers/input/misc/pcspkr.ko

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers
2007-08-18 04:40:39 +02:00
committed by Greg Kroah-Hartman
parent 782e3b3b38
commit 43cc71eed1
4 changed files with 5 additions and 15 deletions
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15
drivers/base/platform.c
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@@ -160,11 +160,6 @@ 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.
*
* This device will be marked as not supporting hotpluggable drivers; no
* device add/remove uevents will be generated. In the unusual case that
* the device isn't being dynamically allocated as a legacy "probe the
* hardware" driver, infrastructure code should reverse this marking.
*/
struct platform_device *platform_device_alloc(const char *name, unsigned int id)
{
@@ -177,12 +172,6 @@ struct platform_device *platform_device_alloc(const char *name, unsigned int id)
pa->pdev.id = id;
device_initialize(&pa->pdev.dev);
pa->pdev.dev.release = platform_device_release;
/* prevent hotplug "modprobe $(MODALIAS)" from causing trouble in
* legacy probe-the-hardware drivers, which don't properly split
* out device enumeration logic from drivers.
*/
pa->pdev.dev.uevent_suppress = 1;
}
return pa ? &pa->pdev : NULL;
@@ -530,7 +519,7 @@ static ssize_t
modalias_show(struct device *dev, struct device_attribute *a, char *buf)
{
struct platform_device *pdev = to_platform_device(dev);
int len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->name);
int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
@@ -546,7 +535,7 @@ static int platform_uevent(struct device *dev, char **envp, int num_envp,
struct platform_device *pdev = to_platform_device(dev);
envp[0] = buffer;
snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name);
snprintf(buffer, buffer_size, "MODALIAS=platform:%s", pdev->name);
return 0;
}