linux-kernel - Re: [PATCH 1/3] Char: cyclades, remove bogus iomap

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:	Mon, 18 Aug 2008 22:38:28 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jiri Slaby <jirislaby@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] Char: cyclades, remove bogus iomap

On Mon, 18 Aug 2008 14:44:38 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Thu, 14 Aug 2008 18:25:52 +0200
> Jiri Slaby <jirislaby@...il.com> wrote:
> 
> > readl/writel are not expected to accept iomap return value. Replace
> > bogus mapping by standard ioremap.
> 
> Confused.  What's wrong with doing readl(pci_iomap(...))?  There are a
> fair number of drivers doing this..

That was discussed some time ago and we fixed a few then.

There is no guarantee that a platform chooses to implement iomaps such
that an iomap cookie is valid for readl/writel. It happens to work on the
current generic implementation.

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/