Re: [PATCH 3.15 099/139] libiscsi, iser: Adjust data_length to include protection information

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On Wed, 2014-07-02 at 17:44 -0500, Mike Christie wrote:
> On 07/02/2014 05:15 PM, Alex Williamson wrote:
> > On Sat, 2014-06-28 at 10:47 -0700, Greg Kroah-Hartman wrote:
> >> > 3.15-stable review patch.  If anyone has any objections, please let me know.
> >> > 
> >> > ------------------
> >> > 
> >> > From: Sagi Grimberg <sagig@xxxxxxxxxxxx>
> >> > 
> >> > commit d77e65350f2d82dfa0557707d505711f5a43c8fd upstream.
> >> > 
> >> > In case protection information exists over the wire
> >> > iscsi header data length is required to include it.
> >> > Use protection information aware scsi helpers to set
> >> > the correct transfer length.
> >> > 
> >> > In order to avoid breakage, remove iser transfer length
> >> > checks for each task as they are not always true and
> >> > somewhat redundant anyway.
> >> > 
> >> > Signed-off-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
> >> > Reviewed-by: Mike Christie <michaelc@xxxxxxxxxxx>
> >> > Acked-by: Mike Christie <michaelc@xxxxxxxxxxx>
> >> > Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
> >> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> >> > 
> >> > ---
> >> >  drivers/infiniband/ulp/iser/iser_initiator.c |   34 +++++++--------------------
> >> >  drivers/scsi/libiscsi.c                      |   18 +++++++-------
> >> >  2 files changed, 19 insertions(+), 33 deletions(-)
> > I'm a bit late to object, but this is causing a regression for me on
> > 3.15.3 and 3.16-rc.  Using an iscsi_tcp rootfs, I'm seeing the NULL
> 
> 
> A fix for this is in Christoph's tree. Here is the status of the patch.
> 
> http://marc.info/?l=linux-kernel&m=140432482527273&w=2

I assume it's this fix:

commit 7bafc240e126c37f60b040fa429ae4a710b88ab5
Author: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Date:   Tue Jun 24 16:59:35 2014 +0200

    scsi: use the scsi data buffer length to extract transfer size
 
In which case it's not marked for stable backport ... I assume it should
be?

James


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