diff options
| author | Timo Sigurdsson <public_timo.s@silentcreek.de> | 2021-06-14 09:25:39 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-06-14 08:26:54 -0600 |
| commit | f6bca4d91b2ea052e917cca3f9d866b5cc1d500a (patch) | |
| tree | 8a7b22d656732661e690e5a24601d2d976db647e /drivers/ata/ahci_sunxi.c | |
| parent | 44b1fbc0f5f30e66a56d29575349f0b1ebe2b0ee (diff) | |
ata: ahci_sunxi: Disable DIPM
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>
Link: https://lore.kernel.org/r/20210614072539.3307-1-public_timo.s@silentcreek.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/ata/ahci_sunxi.c')
| -rw-r--r-- | drivers/ata/ahci_sunxi.c | 2 |
1 files changed, 1 insertions, 1 deletions
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, |