| Message ID | 20210427230537.21423-1-public_timo.s@silentcreek.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ata: ahci_sunxi: Disable DIPM | expand |
On Wed, Apr 28, 2021 at 01:05:37AM +0200, Timo Sigurdsson wrote: > 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 were, it should be considered broken and best be > disabled in the ahci_sunxi driver. > > Fixes: c5754b5220f0 ("ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform") > > [1] https://github.com/allwinner-zh/documents/tree/master/ > > Signed-off-by: Timo Sigurdsson <public_timo.s@silentcreek.de> > Tested-by: Timo Sigurdsson <public_timo.s@silentcreek.de> > --- > 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 > <formletter> This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly. </formletter>
Hello! On 28.04.2021 2:05, Timo Sigurdsson wrote: > 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 were, it should be considered broken and best be ^ was > disabled in the ahci_sunxi driver. > > Fixes: c5754b5220f0 ("ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform") The "Fixes:" tag should immediately precede the signoff tag... > [1] https://github.com/allwinner-zh/documents/tree/master/ And this line should be immediately after the patch description. > Signed-off-by: Timo Sigurdsson <public_timo.s@silentcreek.de> > Tested-by: Timo Sigurdsson <public_timo.s@silentcreek.de> [...] MBR, Sergei
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,
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 were, it should be considered broken and best be disabled in the ahci_sunxi driver. Fixes: c5754b5220f0 ("ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform") [1] https://github.com/allwinner-zh/documents/tree/master/ Signed-off-by: Timo Sigurdsson <public_timo.s@silentcreek.de> Tested-by: Timo Sigurdsson <public_timo.s@silentcreek.de> --- drivers/ata/ahci_sunxi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)