From a58cf90d63b6239ede20c79f57b8ca0c4a27851c Mon Sep 17 00:00:00 2001 From: Subhash Jadavani Date: Mon, 22 Aug 2016 16:43:41 -0700 Subject: [PATCH] scsi: ufs-qcom: skip svs2 configuration for newer controllers Newer QCOM UFS host controller doesn't need to execute the special LPM mode configuration when switching to SVS2 mode. This change looks at the host controller version to bypass this special configuration for newer controller version. Change-Id: Ib84663955c0c0db6124819c4c4749e5c347a3495 Signed-off-by: Subhash Jadavani --- drivers/scsi/ufs/ufs-qcom.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index b8067a11a665..bfa82ca64499 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -2087,6 +2087,11 @@ static inline int ufs_qcom_configure_lpm(struct ufs_hba *hba, bool enable) if (!ufs_qcom_cap_svs2(host)) goto out; + if (!((host->hw_ver.major == 0x3) && + (host->hw_ver.minor == 0x0) && + (host->hw_ver.step == 0x0))) + goto out; + /* * The link should be put in hibern8 state before * configuring the PHY to enter/exit SVS2 mode.