netdev - Re: [PATCH net-next 4/4] net: renesas: rswitch: Improve TX timestamp accuracy

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]

Message-ID: <20230208160634.33d2abfd@kernel.org>
Date:   Wed, 8 Feb 2023 16:06:34 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Cc:     davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] net: renesas: rswitch: Improve TX
 timestamp accuracy

On Wed,  8 Feb 2023 16:34:45 +0900 Yoshihiro Shimoda wrote:
> In the previous code, TX timestamp accuracy was bad because the irq
> handler got the timestamp from the timestamp register at that time.
> 
> This hardware has "Timestamp capture" feature which can store
> each TX timestamp into the timestamp descriptors. To improve
> TX timestamp accuracy, implement timestamp descriptors' handling.

2 new sparse warnings here:

drivers/net/ethernet/renesas/rswitch.c:917:24: warning: restricted __le32 degrades to integer
drivers/net/ethernet/renesas/rswitch.c:918:23: warning: restricted __le32 degrades to integer