netdev - Re: [patch net-next 1/3] mlxsw: spectrum: Reduce number of supported 802.1D bridges

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] [day] [month] [year] [list]

Date:	Wed, 18 May 2016 20:50:40 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jiri@...nulli.us
Cc:	netdev@...r.kernel.org, idosch@...lanox.com, eladr@...lanox.com,
	yotamg@...lanox.com, ogerlitz@...lanox.com,
	roopa@...ulusnetworks.com, gospo@...ulusnetworks.com,
	corbet@....net, sfeldma@...il.com, nicolas.dichtel@...nd.com,
	vivien.didelot@...oirfairelinux.com
Subject: Re: [patch net-next 1/3] mlxsw: spectrum: Reduce number of
 supported 802.1D bridges

From: Jiri Pirko <jiri@...nulli.us>
Date: Wed, 18 May 2016 14:40:50 +0200

> This patch, commit b555cf4a50c17a9714715a2d7c8574dca1a7b356 ("mlxsw: spectrum:
> Reduce number of supported 802.1D bridges") reduced the resources the
> device allocates during init. Newer firmware versions now force a hard
> limit on these resources and thus require this patch.
> 
> We would like to ask this commit be backported to stable kernels, so
> that they can be used with newer firmware versions.

Breaking existing working drivers with a firmware update is a terrible
user experience, and in my opinion not a reason to do a -stable
backport.  Fix how you manage this stuff instead.

This new behavior should be requested by drivers that can handle it,
rather than retroactively forced upon existing setups.