linux-kernel - [PATCH 0/2] libata: introduce ATA_FLAG_NO_LOG

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Message-ID: <cover.1449243748.git.andreas.werner@men.de>
Date:	Fri, 4 Dec 2015 16:52:18 +0100
From:	Andreas Werner <andreas.werner@....de>
To:	<linux-kernel@...r.kernel.org>
CC:	<linux-ide@...r.kernel.org>, <tj@...nel.org>
Subject: [PATCH 0/2] libata: introduce ATA_FLAG_NO_LOG_PAGE

This patchset add a new ata port flag ATA_FLAG_NO_LOG_PAGE to be able
to blacklist ports/controller which e.g. locks up on a log page read.

This flag is added to the sata_fsl driver which is the first affected
one.

The lockup was detected on Freescale P1013/P1022, T4240 using a ATP
mSATA.
The device failed during initialisation if the SATA device includes the
devslp feature.

With this patchset, we blacklist the fsl sata controller and return
a error on any attempt to read a log page. This allows us to access
the mSATA.

Andreas Werner (2):
  libata-eh.c: Introduce new ata port flag for controller which lockup
    on read log page
  ata/sata_fsl.c: add ATA_FLAG_NO_LOG_PAGE to blacklist the controller
    for log page reads

 drivers/ata/libata-eh.c | 9 +++++++++
 drivers/ata/sata_fsl.c  | 3 ++-
 include/linux/libata.h  | 1 +
 3 files changed, 12 insertions(+), 1 deletion(-)

-- 
2.6.2

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