linux-kernel - [PATCH v2 0/6] ATA PASS-THROUGH sense data fixes

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Date: Mon, 24 Jun 2024 22:12:04 +0000
From: Igor Pylypiv <ipylypiv@...gle.com>
To: Damien Le Moal <dlemoal@...nel.org>, Niklas Cassel <cassel@...nel.org>
Cc: Tejun Heo <tj@...nel.org>, Hannes Reinecke <hare@...e.de>, 
	"Martin K. Petersen" <martin.petersen@...cle.com>, Jason Yan <yanaijie@...wei.com>, 
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Igor Pylypiv <ipylypiv@...gle.com>
Subject: [PATCH v2 0/6] ATA PASS-THROUGH sense data fixes

This patch series is fixing a few ATA PASS-THROUGH issues:
1. Not reporting "ATA Status Return sense data descriptor" / "Fixed format
   sense data" when ATA_QCFLAG_SENSE_VALID is set.
2. Generating "fake" sk/asc/ascq based on ATA status/error registers when
   ATA_QCFLAG_SENSE_VALID is set and CK_COND=1.
3. Fixed format sense data was using incorrect field offsets for ATA
   PASS-THROUGH commands.
4. Using qc->result_tf in ATA sense data generation functions without
   checking if qc->result_tf contains a valid data.

Changes since v1:

Thanks Damien and Niklas for the reviews!

- Squashed two v1 patches 2/4 and 3/4 into one patch with a different
  implementation.
- Added 'Cc: stable@...r.kernel.org' tags to patches that are fixing bugs.
- Reordered patches with the 'Cc: stable@...r.kernel.org' tag to be applied
  first in order to simplify backports to stable releases.
- Restored the buffer memset in atapi_eh_request_sense().
- Updated declaration order in v1 patch 4/4.
- Added a patch to cleanup unused ATA device id in ata_to_sense_error().
- Updated fill_result_tf() to set ATA_QCFLAG_RTF_FILLED after populating
  the result taskfile. Removed now redundant flag sets/checks from ahci.
- Updated ATA sense data generation functions to return early if result_tf
  is not filled. Added WARN_ON_ONCE checks to generate a warning when
  ATA_QCFLAG_RTF_FILLED is not set and libata needs to generate sense data.

Igor Pylypiv (6):
  ata: libata-scsi: Do not overwrite valid sense data when CK_COND=1
  ata: libata-scsi: Fix offsets for the fixed format sense data
  ata: libata-scsi: Remove redundant sense_buffer memsets
  ata: libata-scsi: Do not pass ATA device id to ata_to_sense_error()
  ata: libata: Set ATA_QCFLAG_RTF_FILLED in fill_result_tf()
  ata: libata-scsi: Check ATA_QCFLAG_RTF_FILLED before using result_tf

 drivers/ata/libahci.c     |  10 ---
 drivers/ata/libata-core.c |   8 ++
 drivers/ata/libata-scsi.c | 179 +++++++++++++++++++++-----------------
 3 files changed, 107 insertions(+), 90 deletions(-)

-- 
2.45.2.741.gdbec12cfda-goog