Subject: Re: [PATCH 1/2] net: ethernet: sxgbe: remove private tx queue lock

From: Pavel Machek <[email-masked]>
Date: Sun, 18 Dec 2016 18:23:35 +0100

Hi!

> > - e1efa87241272104d6a12c8b9fcdc4f62634d447
> 
> Yep, a sync of the dma descriptors before the hardware gets ownership of the tx tail
> idx is missing in the stmmac, too. 

Thanks for the hint. Actually, the driver uses smp_wmb() which is
completely crazy, and probably misses rmb() in clean_tx, too. Anyway,
I did not notice there are dma_ variants, too... we clearly need them.

Thanks and best regards,
								Pavel
								
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