linux-kernel - [PATCH-v2 0/2] mpt3sas: Reference counting fixes from for-next mpt2sas

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Date:	Sun, 30 Aug 2015 07:54:37 +0000
From:	"Nicholas A. Bellinger" <nab@...erainc.com>
To:	linux-scsi <linux-scsi@...r.kernel.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Calvin Owens <calvinowens@...com>,
	Christoph Hellwig <hch@...radead.org>,
	Sreekanth Reddy <sreekanth.reddy@...gotech.com>,
	"MPT-FusionLinux.pdl" <MPT-FusionLinux.pdl@...gotech.com>,
	kernel-team <kernel-team@...com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH-v2 0/2] mpt3sas: Reference counting fixes from for-next mpt2sas

From: Nicholas Bellinger <nab@...ux-iscsi.org>

Hi all,

This series is a mpt3sas LLD forward port of Calvin Owens' for-next
reference counting bugfix series for mpt2sas LLD code.

His latest patch series can be found here:

[PATCH v4 0/2] Fixes for memory corruption in mpt2sas
http://marc.info/?l=linux-scsi&m=143951695904115&w=2

The differences between mpt2sas + mpt3sas in this area are very
small, and the changes are required to address a class of long
standing NULL pointer dereference bugs through-out both LLDs.

With Calvin's changes in place for mpt3sas, the original NULL
pointer dereference OOPsen during probe with a failed HDD appear
to be resolved, and so far no new regressions have been reported
with -v1 series code.

The -v1 series code for mpt3sas has been tested on v3.14.47 with
40x SAS3008 HBAs, with three preceeding upstream mpt3sas patches:

4dc06fd mpt3sas: delay scsi_add_host call to work with scsi-mq
35b6236 mpt3sas: combine fw_event_work and its event_data
62c4da4 mpt3sas: correct scsi_{target,device} hostdata allocation

Please review.

--nab

-v2 changes:
  - Fix _scsih_block_io_device() v4.3-rc0 brekage
  - Fix mpt3sas_transport_port_add() v4.3-rc0 breakage

Nicholas Bellinger (2):
  mpt3sas: Refcount sas_device objects and fix unsafe list usage
  mpt3sas: Refcount fw_events and fix unsafe list usage

 drivers/scsi/mpt3sas/mpt3sas_base.h      |  25 +-
 drivers/scsi/mpt3sas/mpt3sas_scsih.c     | 595 ++++++++++++++++++++++---------
 drivers/scsi/mpt3sas/mpt3sas_transport.c |  18 +-
 3 files changed, 458 insertions(+), 180 deletions(-)

-- 
1.9.1

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