Re: [dm-devel] [PATCH] dm_ioctl: Introduce DM_UEVENT_GENERATED_FLAG

[Peter Rajnoha <prajnoha redhat com>]

On 03/05/2010 08:32 PM, Alasdair G Kergon wrote:
> On Mon, Mar 01, 2010 at 09:27:17AM +0100, Peter Rajnoha wrote:
>> diff -purN linux-2.6.33-rc8.orig/drivers/md/dm-ioctl.c linux-2.6.33-rc8/drivers/md/dm-ioctl.c
> 
>> @@ -736,10 +738,10 @@ static int dev_remove(struct dm_ioctl *p
>   
>>  	dm_put(md);
>> -	param->data_size = 0;
>>  	return 0;
> 
> Why is that line removed?

That's because of the copy_to_user in the outer ctl_ioctl fn
so it copies back the result (with the new flag). We had nothing
in return before...

Peter