Re: sysfs - which driver for a device?

[Patrick Mochel]

> In sysfs it is easy to see which devices a driver is supporting.
> For example /sys/bus/pci/drivers/e1000 links to 0000:02:0c.0 in my system.
> 
> But how do you go the other way; starting from 0000:02:0c.0 to determine the
> driver? Is the best solution to loop though the drivers directories searching
> for the device? Or would it be better to change sysfs to add an attribute to
> each device containing the driver name?

Well, one could use a script to ascertain the driver name for a given 
device. Or, you could use the patch below, which will insert a 'driver' 
symlink that points to the device driver's directory. 


	Pat

===== drivers/base/bus.c 1.51 vs edited =====
--- 1.51/drivers/base/bus.c	Fri Aug 29 14:18:26 2003
+++ edited/drivers/base/bus.c	Thu Sep 25 10:55:14 2003
@@ -243,6 +243,7 @@
 	list_add_tail(&dev->driver_list,&dev->driver->devices);
 	sysfs_create_link(&dev->driver->kobj,&dev->kobj,
 			  kobject_name(&dev->kobj));
+	sysfs_create_link(&dev->kobj,&dev->driver->kobj,"driver");
 }
 
 
@@ -365,6 +366,7 @@
 	struct device_driver * drv = dev->driver;
 	if (drv) {
 		sysfs_remove_link(&drv->kobj,kobject_name(&dev->kobj));
+		sysfs_remove_link(&dev->kobj,"driver");
 		list_del_init(&dev->driver_list);
 		device_detach_shutdown(dev);
 		if (drv->remove)

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/