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, 28 Dec 2009 16:08:47 +0000
From:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>
To:	"Williams, Dan J" <dan.j.williams@...el.com>
CC:	"stable@...nel.org" <stable@...nel.org>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/3] ioat3: fix p-disabled q-continuation

Williams, Dan J wrote:
> When continuing a pq calculation the driver needs 3 extra sources.  The
> driver can perform a 3 source calculation with a single descriptor, but
> needs an extended descriptor to process up to 8 sources in one
> operation.  However, in the p-disabled case only one extra source is
> needed.  When continuing a p-disabled operation there are occasions
> (i.e. 0 < src_cnt % 8 < 3) where the tail operation does not need an
> extended descriptor.  Properly account for this fact otherwise invalid
> 'dmacount' values will be written to hardware usually causing the
> channel to halt with 'invalid descriptor' errors.
> 
> Cc: <stable@...nel.org>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---

Acked-by: Maciej Sosnowski <maciej.sosnowski@...el.com>
--
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/

Powered by blists - more mailing lists