From: Timo Sigurdsson <public_timo.s@silentcreek.de>
To: axboe@kernel.dk, mripard@kernel.org, wens@csie.org,
jernej.skrabec@siol.net, linux-ide@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org
Cc: sergei.shtylyov@gmail.com, gregkh@linuxfoundation.org,
oliver@schinagl.nl,
Timo Sigurdsson <public_timo.s@silentcreek.de>
Subject: [PATCH v2 RESEND] ata: ahci_sunxi: Disable DIPM
Date: Mon, 14 Jun 2021 09:25:39 +0200 [thread overview]
Message-ID: <20210614072539.3307-1-public_timo.s@silentcreek.de> (raw)
DIPM is unsupported or broken on sunxi. Trying to enable the power
management policy med_power_with_dipm on an Allwinner A20 SoC based board
leads to immediate I/O errors and the attached SATA disk disappears from
the /dev filesystem. A reset (power cycle) is required to make the SATA
controller or disk work again. The A10 and A20 SoC data sheets and manuals
don't mention DIPM at all [1], so it's fair to assume that it's simply not
supported. But even if it was, it should be considered broken and best be
disabled in the ahci_sunxi driver.
[1] https://github.com/allwinner-zh/documents/tree/master/
Fixes: c5754b5220f0 ("ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform")
Cc: stable@vger.kernel.org
Signed-off-by: Timo Sigurdsson <public_timo.s@silentcreek.de>
Tested-by: Timo Sigurdsson <public_timo.s@silentcreek.de>
---
Changes since v1:
- Formal changes to the commit message as suggested by Greg Kroah-Hartman
and Sergei Shtylyov (Fixes and Cc lines). No changes to the patch
itself.
---
drivers/ata/ahci_sunxi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
index cb69b737cb49..56b695136977 100644
--- a/drivers/ata/ahci_sunxi.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -200,7 +200,7 @@ static void ahci_sunxi_start_engine(struct ata_port *ap)
}
static const struct ata_port_info ahci_sunxi_port_info = {
- .flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
+ .flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ | ATA_FLAG_NO_DIPM,
.pio_mask = ATA_PIO4,
.udma_mask = ATA_UDMA6,
.port_ops = &ahci_platform_ops,
--
2.26.2
next reply other threads:[~2021-06-14 7:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-14 7:25 Timo Sigurdsson [this message]
2021-06-14 14:27 ` [PATCH v2 RESEND] ata: ahci_sunxi: Disable DIPM Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210614072539.3307-1-public_timo.s@silentcreek.de \
--to=public_timo.s@silentcreek.de \
--cc=axboe@kernel.dk \
--cc=gregkh@linuxfoundation.org \
--cc=jernej.skrabec@siol.net \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sunxi@lists.linux.dev \
--cc=mripard@kernel.org \
--cc=oliver@schinagl.nl \
--cc=sergei.shtylyov@gmail.com \
--cc=wens@csie.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).