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From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Dakshaja Uppalapati <dakshaja@chelsio.com>,
	dledford@redhat.com, linux-rdma@vger.kernel.org,
	bharat@chelsio.com
Subject: Re: [PATCH for-rc] iw_cxgb4: Fix refcount underflow while destroying cqs.
Date: Thu, 22 Jul 2021 17:01:30 +0300	[thread overview]
Message-ID: <YPl6Oh5Gm0uQPiiZ@unreal> (raw)
In-Reply-To: <20210722130231.GI1117491@nvidia.com>

On Thu, Jul 22, 2021 at 10:02:31AM -0300, Jason Gunthorpe wrote:
> On Thu, Jul 22, 2021 at 03:57:39PM +0300, Leon Romanovsky wrote:
> 
> > We are talking about two different issues that this refcount_read patch pointed.
> > You are focused on wrong usage of completion, I saw useless compare of
> > refcount_t with 0 that can't be.
> 
> It can be zero. Anything that does refcount_dec_and_test() can make
> the refcount be zero.

It can be, but it is not the case at least for iwpm.

Thanks

  parent reply	other threads:[~2021-07-22 14:01 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 11:21 [PATCH for-rc] iw_cxgb4: Fix refcount underflow while destroying cqs Dakshaja Uppalapati
2021-07-22  7:43 ` Leon Romanovsky
2021-07-22 12:06   ` Jason Gunthorpe
2021-07-22 12:57     ` Leon Romanovsky
2021-07-22 13:02       ` Jason Gunthorpe
2021-07-22 13:23         ` Dakshaja Uppalapati
2021-07-22 14:01         ` Leon Romanovsky [this message]
2021-07-22 14:02           ` Jason Gunthorpe
     [not found]             ` <20210803155919.GB11439@chelsio.com>
2021-08-03 16:09               ` Jason Gunthorpe

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