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Subjectide: MODALIAS support for autoloading of ide-cd, ide-disk, ...
This applies on top of the changes currently in the -mm tree, which
rename ".hotplug" to ".uevent". I don't have any IDE hardware left
around here, so I've tested it only with a PCMCIA CF adapter. :)

Thanks,
Kay



From: Kay Sievers <kay.sievers@suse.de>

IDE: MODALIAS support for autoloading of ide-cd, ide-disk, ...

Add MODULE_ALIAS to IDE midlayer modules to autoload them depending
on the probed media type.

$ modinfo ide-disk
filename: /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko
description: ATA DISK Driver
alias: ide:*m-disk*
license: GPL
...

$ modprobe -vn ide:m-disk
insmod /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko

$ cat /sys/bus/ide/devices/0.0/modalias
ide:m-disk

It also adds attributes to the IDE device:
$ tree /sys/bus/ide/devices/0.0/
/sys/bus/ide/devices/0.0/
|-- bus -> ../../../../../../../bus/ide
|-- drivename
|-- media
|-- modalias
|-- power
| |-- state
| `-- wakeup
`-- uevent

$ cat /sys/bus/ide/devices/0.0/{modalias,drivename,media}
ide:m-disk
hda
disk

Signed-off-by: Kay Sievers <kay.sievers@suse.de>
---
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 9455e42..24e3e64 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3516,6 +3516,7 @@ static int __init ide_cdrom_init(void)
return driver_register(&ide_cdrom_driver.gen_driver);
}

+MODULE_ALIAS("ide:*m-cdrom*");
module_init(ide_cdrom_init);
module_exit(ide_cdrom_exit);
MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index f4e3d35..06fb261 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -1271,6 +1271,7 @@ static int __init idedisk_init(void)
return driver_register(&idedisk_driver.gen_driver);
}

+MODULE_ALIAS("ide:*m-disk*");
module_init(idedisk_init);
module_exit(idedisk_exit);
MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 9e293c8..fba3fff 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -2197,6 +2197,7 @@ static int __init idefloppy_init(void)
return driver_register(&idefloppy_driver.gen_driver);
}

+MODULE_ALIAS("ide:*m-floppy*");
module_init(idefloppy_init);
module_exit(idefloppy_exit);
MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 7d7944e..a621548 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -4947,6 +4947,7 @@ out:
return error;
}

+MODULE_ALIAS("ide:*m-tape*");
module_init(idetape_init);
module_exit(idetape_exit);
MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 8af179b..96d39a1 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -1904,9 +1904,73 @@ static int ide_bus_match(struct device *
return 1;
}

+static char *media_string(ide_drive_t *drive)
+{
+ switch (drive->media) {
+ case ide_disk:
+ return "disk";
+ case ide_cdrom:
+ return "cdrom";
+ case ide_tape:
+ return "tape";
+ case ide_floppy:
+ return "floppy";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ ide_drive_t *drive = dev->driver_data;
+ return sprintf(buf, "%s\n", media_string(drive));
+}
+
+static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ ide_drive_t *drive = dev->driver_data;
+ return sprintf(buf, "%s\n", drive->name);
+}
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ ide_drive_t *drive = dev->driver_data;
+ return sprintf(buf, "ide:m-%s\n", media_string(drive));
+}
+
+static struct device_attribute ide_dev_attrs[] = {
+ __ATTR_RO(media),
+ __ATTR_RO(drivename),
+ __ATTR_RO(modalias),
+ __ATTR_NULL
+};
+
+static int ide_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ ide_drive_t *drive = dev->driver_data;
+ int i = 0;
+ int length = 0;
+
+ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+ "MEDIA=%s", media_string(drive));
+
+ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+ "DRIVENAME=%s", drive->name);
+
+ add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
+ "MODALIAS=ide:m-%s",
+ media_string(drive));
+
+ envp[i] = NULL;
+ return 0;
+}
+
struct bus_type ide_bus_type = {
.name = "ide",
.match = ide_bus_match,
+ .uevent = ide_uevent,
+ .dev_attrs = ide_dev_attrs,
.suspend = generic_ide_suspend,
.resume = generic_ide_resume,
};

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