netdev - Re: [PATCH] net: lantiq: Add locking for TX DMA channel

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Message-Id: <20200921.171811.928921340970787118.davem@davemloft.net>
Date:   Mon, 21 Sep 2020 17:18:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     hauke@...ke-m.de
Cc:     kuba@...nel.org, netdev@...r.kernel.org,
        martin.blumenstingl@...glemail.com
Subject: Re: [PATCH] net: lantiq: Add locking for TX DMA channel

From: Hauke Mehrtens <hauke@...ke-m.de>
Date: Tue, 22 Sep 2020 00:31:13 +0200

> The TX DMA channel data is accessed by the xrx200_start_xmit() and the
> xrx200_tx_housekeeping() function from different threads. Make sure the
> accesses are synchronized by using locking around the accesses.
> 
> Signed-off-by: Hauke Mehrtens <hauke@...ke-m.de>

The TX lock will be held during the xrx200_start_xmit() routine, always.

Please use that in xrx200_tx_housekeeping() instead of adding a new
unnecessary lock.

Thank you.