netdev - Re: [PATCH 5.10 1/1] mt76: fix mt7615_init_tx

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Date:   Mon, 30 Jan 2023 15:01:23 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Жандарович Никита Игоревич <n.zhandarovich@...tech.ru>
Cc:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexey Khoroshilov <khoroshilov@...ras.ru>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>
Subject: Re: [PATCH 5.10 1/1] mt76: fix mt7615_init_tx_queues() return value

On Mon, Jan 30, 2023 at 01:48:24PM +0000, Жандарович Никита Игоревич wrote:
> > On Mon, Jan 30, 2023 at 01:27:26PM +0000, Жандарович Никита Игоревич
> > wrote:
> > > > What is the git commit id of this upstream?
> > > >
> > > > And I can't apply this as-is for the obvious reason it would mess up
> > > > the changelog, how did you create this?
> > > >
> > > > confused,
> > > >
> > > > greg k-h
> > >
> > > Commit in question is b671da33d1c5973f90f098ff66a91953691df582
> > > upstream. I wasn't certain it makes sense to backport the whole patch
> > > as only a small portion of it pertains to the fault at question.
> > 
> > What is the "fault"?
> 
> In 5.10.y "mt7615_init_tx_queues() returns 0 regardless of how final
> mt7615_init_tx_queue() performs. If mt7615_init_tx_queue() fails (due to
> memory issues, for instance), parent function will still erroneously
> return 0."

And how can memory issues actually be triggered in a real system?  Is
this a fake problem or something you can validate and verify works
properly?

Don't worry about fake issues for stable backports please.

thanks,

greg k-h