This is a note to let you know that I've just added the patch titled
libata: add ATA_HORKAGE_NOLPM for Pioneer BDR-207M and BDR-205
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libata-add-ata_horkage_nolpm-for-pioneer-bdr-207m-and-bdr-205.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ea08aec7e77bfd6599489ec430f9f859ab84575a Mon Sep 17 00:00:00 2001
From: Niklas Cassel <niklas.cassel@xxxxxxx>
Date: Mon, 26 Sep 2022 18:38:09 +0000
Subject: libata: add ATA_HORKAGE_NOLPM for Pioneer BDR-207M and BDR-205
From: Niklas Cassel <niklas.cassel@xxxxxxx>
commit ea08aec7e77bfd6599489ec430f9f859ab84575a upstream.
Commit 1527f69204fe ("ata: ahci: Add Green Sardine vendor ID as
board_ahci_mobile") added an explicit entry for AMD Green Sardine
AHCI controller using the board_ahci_mobile configuration (this
configuration has later been renamed to board_ahci_low_power).
The board_ahci_low_power configuration enables support for low power
modes.
This explicit entry takes precedence over the generic AHCI controller
entry, which does not enable support for low power modes.
Therefore, when commit 1527f69204fe ("ata: ahci: Add Green Sardine
vendor ID as board_ahci_mobile") was backported to stable kernels,
it make some Pioneer optical drives, which was working perfectly fine
before the commit was backported, stop working.
The real problem is that the Pioneer optical drives do not handle low
power modes correctly. If these optical drives would have been tested
on another AHCI controller using the board_ahci_low_power configuration,
this issue would have been detected earlier.
Unfortunately, the board_ahci_low_power configuration is only used in
less than 15% of the total AHCI controller entries, so many devices
have never been tested with an AHCI controller with low power modes.
Fixes: 1527f69204fe ("ata: ahci: Add Green Sardine vendor ID as board_ahci_mobile")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Jaap Berkhout <j.j.berkhout@xxxxxxxxxxxxxx>
Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxx>
Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ata/libata-core.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3936,6 +3936,10 @@ static const struct ata_blacklist_entry
{ "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
{ "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
+ /* These specific Pioneer models have LPM issues */
+ { "PIONEER BD-RW BDR-207M", NULL, ATA_HORKAGE_NOLPM },
+ { "PIONEER BD-RW BDR-205", NULL, ATA_HORKAGE_NOLPM },
+
/* Crucial BX100 SSD 500GB has broken LPM support */
{ "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
Patches currently in stable-queue which might be from niklas.cassel@xxxxxxx are
queue-5.10/libata-add-ata_horkage_nolpm-for-pioneer-bdr-207m-and-bdr-205.patch
