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Date: Tue, 29 Jan 2019 10:09:55 +0100 From: Niklas Cassel <niklas.cassel@...aro.org> To: davem@...emloft.net, stable@...r.kernel.org Cc: netdev@...r.kernel.org, vinod.koul@...aro.org Subject: Re: Request for stable backport: stmmac: Use correct values in TQS/RQS fields Adding stable since I see Greg's Sign-off-by on recent backports to this driver. On Wed, Dec 19, 2018 at 10:55:16AM +0100, Niklas Cassel wrote: > Hello David, > > I can observe a netdev watchdog timeout on kernel 4.14.78 when using stmmac > with multiple tx queues. > > Backporting the following commit: > > commit 52a76235d0c4dd259cd0df503afed4757c04ba1d > Author: Jose Abreu <Jose.Abreu@...opsys.com> > Date: Fri Oct 13 10:58:36 2017 +0100 > > net: stmmac: Use correct values in TQS/RQS fields > > Currently we are using all the available fifo size in RQS and > TQS fields. This will not work correctly in multi-queues IP's > because total fifo size must be splitted to the enabled queues. > > Correct this by computing the available fifo size per queue and > setting the right value in TQS and RQS fields. > > Signed-off-by: Jose Abreu <joabreu@...opsys.com> > Cc: David S. Miller <davem@...emloft.net> > Cc: Joao Pinto <jpinto@...opsys.com> > Cc: Giuseppe Cavallaro <peppe.cavallaro@...com> > Cc: Alexandre Torgue <alexandre.torgue@...com> > Signed-off-by: David S. Miller <davem@...emloft.net> > > > resolves the issue. > > The fix was first included in v4.15 > $ git tag --contains 52a76235d0c4dd259cd0df503afed4757c04ba1d > v4.15 > v4.15-rc1 > v4.15-rc2 > > Could you please queue it up for 4.14 stable? > > > Kind regards, > Niklas
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