linux-kernel - Re: [PATCH 4/5] hv: kvp: use wrappers to propaigate state

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Message-ID: <20150921101826.GA4252@aepfle.de>
Date:	Mon, 21 Sep 2015 12:18:26 +0200
From:	Olaf Hering <olaf@...fle.de>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Greg KH <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	apw@...onical.com, vkuznets@...hat.com, jasowang@...hat.com
Subject: Re: [PATCH 4/5] hv: kvp: use wrappers to propaigate state

On Sun, Sep 20, Greg KH wrote:

> On Tue, Sep 15, 2015 at 05:37:53PM -0700, K. Y. Srinivasan wrote:
> > @@ -122,8 +125,8 @@ static void kvp_timeout_func(struct work_struct *dummy)

> > +	if (kvp_get_state() > HVUTIL_READY)
> > +		kvp_set_state(HVUTIL_READY);

> And what if the state changed the line after this?  Oops, your code is
> hosed.  See, you need a lock, do this correctly.

KY,  can this happen?

Olaf
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