netdev - Re: [PATCH v2] net: macb: Apply RXUBR workaround only to versions with errata

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Message-Id: <20190129.094123.395728867400146205.davem@davemloft.net>
Date:   Tue, 29 Jan 2019 09:41:23 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     harini.katakam@...inx.com
Cc:     nicolas.ferre@...rochip.com, claudiu.beznea@...rochip.com,
        brandon.streiff@...com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, michal.simek@...inx.com,
        harinikatakamlinux@...il.com
Subject: Re: [PATCH v2] net: macb: Apply RXUBR workaround only to versions
 with errata

From: Harini Katakam <harini.katakam@...inx.com>
Date: Tue, 29 Jan 2019 15:20:03 +0530

> The interrupt handler contains a workaround for RX hang applicable
> to Zynq and AT91RM9200 only. Subsequent versions do not need this
> workaround. This workaround unnecessarily resets RX whenever RX used
> bit read is observed, which can be often under heavy traffic. There
> is no other action performed on RX UBR interrupt. Hence introduce a
> CAPS mask; enable this interrupt and workaround only on affected
> versions.
> 
> Signed-off-by: Harini Katakam <harini.katakam@...inx.com>

Applied, thank you.