linux-kernel - [PATCH V1 0/2] Fix hibern8 enter failure during host reset

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Message-Id: <20230725192710.26698-1-quic_nitirawa@quicinc.com>
Date:   Wed, 26 Jul 2023 00:57:08 +0530
From:   Nitin Rawat <quic_nitirawa@...cinc.com>
To:     powen.kao@...iatek.com, bvanassche@....org,
        alim.akhtar@...sung.com, adrian.hunter@...el.com,
        jejb@...ux.ibm.com, stanley.chu@...iatek.com,
        asutoshd@...eaurora.org, quic_cang@...cinc.com, mani@...nel.org,
        martin.petersen@...cle.com, beanhuo@...ron.com,
        ebiggers@...gle.com, agross@...nel.org, Arthur.Simchaev@....com,
        konrad.dybcio@...aro.org
Cc:     quic_ziqichen@...cinc.com, quic_nguyenb@...cinc.com,
        quic_narepall@...cinc.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Nitin Rawat <quic_nitirawa@...cinc.com>
Subject: [PATCH V1 0/2] Fix hibern8 enter failure during host reset

Commit <52a518019c> ("Fix missing clk change notification on host reset")
added clock scaling notification to ufshcd_host_reset_and_restore.
This invokes hibern8 enter and exit on qualcomm platform which fails
because controller is in reset state.

Fix this by checking the Host controller state before sending
hibern8 command.

__ufshcd_wl_resume()
ufshcd_reset_and_restore()
ufshcd_host_reset_and_restore()
ufshcd_scale_clks()
ufshcd_vops_clk_scale_notify()
ufs_qcom_clk_scale_notify()
ufshcd_uic_hibern8_enter()

Fixes: 52a518019ca1 ("scsi: ufs: core: Fix missing clk change notification on host reset")

Nitin Rawat (2):
  scsi: ufs: core: Export ufshcd_is_hba_active
  scsi: ufs: ufs-qcom: check host controller state

 drivers/ufs/core/ufshcd.c   | 3 ++-
 drivers/ufs/host/ufs-qcom.c | 4 ++++
 include/ufs/ufshcd.h        | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

--
2.17.1