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SubjectRe: [PATCH v3 5/5] Revert "scsi: ufs: disable vccq if it's not needed by UFS device"
On 2/4/2019 12:51 PM, Avri Altman wrote:
>> This reverts commit 60f0187031c05e04cbadffb62f557d0ff3564490.
>> Calling ufshcd_set_vccq_rail_unused hangs my system.
>> It seems vccq is not *not* needed.
> This patch essentially implements the UFS_DEVICE_NO_VCCQ quirk,
> Which is needed for both Samsung and Hynix devices.

Needed, or optimal?
I'm rather sure Marc's device has a Samsung UFS chip, as do my devices
and we've seen nothing but benefit from the proposed revert.

> Once acked by those vendors, can be removed from the quirk list as well.
> Thanks,
> Avri
>> Signed-off-by: Marc Gonzalez <>

Jeffrey Hugo
Qualcomm Datacenter Technologies as an affiliate of Qualcomm
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.

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