xen-devel.lists.xenproject.org archive mirror
 help / color / mirror / Atom feed
From: Wei Liu <wei.liu2@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: George Dunlap <George.Dunlap@eu.citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	Wei Liu <wei.liu2@citrix.com>,
	Paulina Szubarczyk <paulinaszubarczyk@gmail.com>,
	Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH] libxl: fix an error path that uses uninitialised rc in libxl_set_memory_target
Date: Wed, 22 Jun 2016 14:59:34 +0100	[thread overview]
Message-ID: <20160622135934.GF1790@citrix.com> (raw)
In-Reply-To: <576AB49402000078000F7B56@prv-mh.provo.novell.com>

On Wed, Jun 22, 2016 at 07:53:56AM -0600, Jan Beulich wrote:
> >>> On 22.06.16 at 15:47, <wei.liu2@citrix.com> wrote:
> > On Wed, Jun 22, 2016 at 06:58:28AM -0600, Jan Beulich wrote:
> >> >>> On 12.06.16 at 16:09, <wei.liu2@citrix.com> wrote:
> >> > --- a/tools/libxl/libxl.c
> >> > +++ b/tools/libxl/libxl.c
> >> > @@ -4927,10 +4927,12 @@ retry_transaction:
> >> >  
> >> >      target = libxl__xs_read(gc, t, GCSPRINTF("%s/memory/target", dompath));
> >> >      if (!target && !domid) {
> >> > -        if (!xs_transaction_end(ctx->xsh, t, 1))
> >> > +        if (!xs_transaction_end(ctx->xsh, t, 1)) {
> >> > +            rc = ERROR_FAIL;
> >> 
> >> I'm sorry for noticing this only now - is ERROR_FAIL the right thing
> >> to use here, considering how things worked before the change that
> >> introduced the issue getting fixed here? I had intentionally decided
> >> to use ERROR_INVAL in the patch variant I did submit (as at that
> >> time I wasn't yet aware of the other fix floating around already).
> >> 
> > 
> > When I wrote this patch, I thought the return value should be tied to
> > xs_transaction_end.
> 
> xs_transaction_end() returning zero means success afaict.
> 

/* End a transaction.
 * If abandon is true, transaction is discarded instead of committed.
 * Returns false on failure: if errno == EAGAIN, you have to restart
 * transaction.
 */
bool xs_transaction_end(struct xs_handle *h, xs_transaction_t t,
                        bool abort);

I think you misread.

Wei.

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

  reply	other threads:[~2016-06-22 13:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-12 14:09 Wei Liu
2016-06-20 13:32 ` Ian Jackson
2016-06-22 12:58 ` Jan Beulich
2016-06-22 13:47   ` Wei Liu
2016-06-22 13:53     ` Jan Beulich
2016-06-22 13:59       ` Wei Liu [this message]
2016-06-22 15:20         ` Jan Beulich
2016-06-22 15:29           ` Wei Liu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20160622135934.GF1790@citrix.com \
    --to=wei.liu2@citrix.com \
    --cc=George.Dunlap@eu.citrix.com \
    --cc=JBeulich@suse.com \
    --cc=ian.jackson@eu.citrix.com \
    --cc=paulinaszubarczyk@gmail.com \
    --cc=xen-devel@lists.xenproject.org \
    --subject='Re: [PATCH] libxl: fix an error path that uses uninitialised rc in libxl_set_memory_target' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).