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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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.