diff options
author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 08:41:41 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-06-24 13:07:53 -0400 |
commit | 816724e65c72a90a44fbad0ef0b59b186c85fa90 (patch) | |
tree | 421fa29aedff988e392f92780637553e275d37a0 /drivers/base/platform.c | |
parent | 70ac4385a13f78bc478f26d317511893741b05bd (diff) | |
parent | d384ea691fe4ea8c2dd5b9b8d9042eb181776f18 (diff) |
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Conflicts:
fs/nfs/inode.c
fs/super.c
Fix conflicts between patch 'NFS: Split fs/nfs/inode.c' and patch
'VFS: Permit filesystem to override root dentry on mount'
Diffstat (limited to 'drivers/base/platform.c')
-rw-r--r-- | drivers/base/platform.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 83f5c5984d1a..2b8755db76c6 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -275,7 +275,7 @@ int platform_device_add(struct platform_device *pdev) pr_debug("Registering platform device '%s'. Parent at %s\n", pdev->dev.bus_id, pdev->dev.parent->bus_id); - ret = device_register(&pdev->dev); + ret = device_add(&pdev->dev); if (ret == 0) return ret; @@ -452,6 +452,37 @@ void platform_driver_unregister(struct platform_driver *drv) EXPORT_SYMBOL_GPL(platform_driver_unregister); +/* modalias support enables more hands-off userspace setup: + * (a) environment variable lets new-style hotplug events work once system is + * fully running: "modprobe $MODALIAS" + * (b) sysfs attribute lets new-style coldplug recover from hotplug events + * mishandled before system is fully running: "modprobe $(cat modalias)" + */ +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); + + return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; +} + +static struct device_attribute platform_dev_attrs[] = { + __ATTR_RO(modalias), + __ATTR_NULL, +}; + +static int platform_uevent(struct device *dev, char **envp, int num_envp, + char *buffer, int buffer_size) +{ + struct platform_device *pdev = to_platform_device(dev); + + envp[0] = buffer; + snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name); + return 0; +} + + /** * platform_match - bind platform device to platform driver. * @dev: device. @@ -496,7 +527,9 @@ static int platform_resume(struct device * dev) struct bus_type platform_bus_type = { .name = "platform", + .dev_attrs = platform_dev_attrs, .match = platform_match, + .uevent = platform_uevent, .suspend = platform_suspend, .resume = platform_resume, }; |