[dm-devel] [PATCH] dm_ioctl: Introduce DM_UEVENT_GENERATED_FLAG
Peter Rajnoha
prajnoha at redhat.com
Mon Mar 8 07:07:08 UTC 2010
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
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