Re: libsysfs/udev hang

[Carl-Daniel Hailfinger <c-d.hailfinger.kernel.2004@gmx.net>]

Greg KH wrote:
> On Tue, Mar 23, 2004 at 12:55:09PM +0100, Carl-Daniel Hailfinger wrote:
> 
>>        sysfs_dev = sysfs_get_classdev_device(class_dev);
>>        if (sysfs_dev != NULL)
>>                printf("follow the class device's \"device\"\n");
>>
>>        /* look the device chain upwards */
>>        while (sysfs_dev != NULL) {
> 
> 
> <snip>
> 
>>                sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev);
>>                printf("point4\n");
>>                if (sysfs_dev_parent = NULL)
>>                        break;
>>                printf("point5\n");
>>
>>                sysfs_dev = sysfs_dev_parent;
>>                printf("point6\n");
>>        }
>>        printf("point7\n");
>>        sysfs_close_device(sysfs_dev);
> 
> 
> At this point in time, sysfs_dev will not point to the oritinal device
> you got from the sysfs_get_glassdev_device() call, right?

Right.

> That's probably the bug.

Then it has to be fixed in udevinfo.c:print_device_chain, too.

Unfortunately this does not explain why the lockup vanishes once I compile
with DEBUG=true. Added debugging should not change the behaviour of a
library, right?


Thanks,
Carl-Daniel



-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id\x1470&alloc_id638&op=click
_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel