From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Adrian Hunter <adrian.hunter@intel.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Sasha Levin <sashal@kernel.org>,
linux-scsi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 3/8] scsi: ufs-pci: Ensure UFS device is in PowerDown mode for suspend-to-disk ->poweroff()
Date: Mon, 4 Jan 2021 19:59:54 -0500 [thread overview]
Message-ID: <20210105005959.3954510-3-sashal@kernel.org> (raw)
In-Reply-To: <20210105005959.3954510-1-sashal@kernel.org>
From: Adrian Hunter <adrian.hunter@intel.com>
[ Upstream commit af423534d2de86cd0db729a5ac41f056ca8717de ]
The expectation for suspend-to-disk is that devices will be powered-off, so
the UFS device should be put in PowerDown mode. If spm_lvl is not 5, then
that will not happen. Change the pm callbacks to force spm_lvl 5 for
suspend-to-disk poweroff.
Link: https://lore.kernel.org/r/20201207083120.26732-3-adrian.hunter@intel.com
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/ufs/ufshcd-pci.c | 34 ++++++++++++++++++++++++++++++++--
1 file changed, 32 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
index ffe6f82182ba8..68f4f67c5ff88 100644
--- a/drivers/scsi/ufs/ufshcd-pci.c
+++ b/drivers/scsi/ufs/ufshcd-pci.c
@@ -96,6 +96,30 @@ static int ufshcd_pci_resume(struct device *dev)
{
return ufshcd_system_resume(dev_get_drvdata(dev));
}
+
+/**
+ * ufshcd_pci_poweroff - suspend-to-disk poweroff function
+ * @dev: pointer to PCI device handle
+ *
+ * Returns 0 if successful
+ * Returns non-zero otherwise
+ */
+static int ufshcd_pci_poweroff(struct device *dev)
+{
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ int spm_lvl = hba->spm_lvl;
+ int ret;
+
+ /*
+ * For poweroff we need to set the UFS device to PowerDown mode.
+ * Force spm_lvl to ensure that.
+ */
+ hba->spm_lvl = 5;
+ ret = ufshcd_system_suspend(hba);
+ hba->spm_lvl = spm_lvl;
+ return ret;
+}
+
#endif /* !CONFIG_PM_SLEEP */
#ifdef CONFIG_PM
@@ -190,8 +214,14 @@ ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
}
static const struct dev_pm_ops ufshcd_pci_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend,
- ufshcd_pci_resume)
+#ifdef CONFIG_PM_SLEEP
+ .suspend = ufshcd_pci_suspend,
+ .resume = ufshcd_pci_resume,
+ .freeze = ufshcd_pci_suspend,
+ .thaw = ufshcd_pci_resume,
+ .poweroff = ufshcd_pci_poweroff,
+ .restore = ufshcd_pci_resume,
+#endif
SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
ufshcd_pci_runtime_resume,
ufshcd_pci_runtime_idle)
--
2.27.0
next prev parent reply other threads:[~2021-01-05 1:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 0:59 [PATCH AUTOSEL 4.19 1/8] workqueue: Kick a worker based on the actual activation of delayed works Sasha Levin
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 2/8] scsi: ufs: Fix wrong print message in dev_err() Sasha Levin
2021-01-05 0:59 ` Sasha Levin [this message]
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 4/8] scsi: ide: Do not set the RQF_PREEMPT flag for sense requests Sasha Levin
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 5/8] scsi: scsi_transport_spi: Set RQF_PM for domain validation commands Sasha Levin
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 6/8] kdev_t: always inline major/minor helper functions Sasha Levin
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 7/8] lib/genalloc: fix the overflow when size is too big Sasha Levin
2021-01-05 0:59 ` [PATCH AUTOSEL 4.19 8/8] depmod: handle the case of /sbin/depmod without /sbin in PATH Sasha Levin
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