Re: [PATCH v2 RESEND] ata: ahci_sunxi: Disable DIPM
From: Jens Axboe <axboe@kernel.dk>
Date: 2021-06-14 14:28:08
Also in:
linux-ide, linux-sunxi, lkml
On 6/14/21 1:25 AM, 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 was, it should be considered broken and best be disabled in the ahci_sunxi driver.
Applied, thanks. -- Jens Axboe _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel