From: Timo Sigurdsson Date: Mon, 14 Jun 2021 07:25:39 +0000 (+0200) Subject: ata: ahci_sunxi: Disable DIPM X-Git-Tag: v5.15~915^2~19 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f6bca4d91b2ea052e917cca3f9d866b5cc1d500a;p=platform%2Fkernel%2Flinux-starfive.git 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 Tested-by: Timo Sigurdsson Link: https://lore.kernel.org/r/20210614072539.3307-1-public_timo.s@silentcreek.de Signed-off-by: Jens Axboe --- diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c index cb69b73..56b6951 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,