scsi: ufs: core: Simplify driver shutdown

All UFS host drivers call ufshcd_shutdown(). Hence, instead of calling
ufshcd_shutdown() from the host driver .shutdown() callback, inline that
function into ufshcd_wl_shutdown().
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230524203659.1394307-5-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/core/ufshcd.c

@@ -9950,9 +9950,7 @@ EXPORT_SYMBOL(ufshcd_runtime_resume);
 static void ufshcd_wl_shutdown(struct device *dev)
 {
 	struct scsi_device *sdev = to_scsi_device(dev);
-	struct ufs_hba *hba;
-
-	hba = shost_priv(sdev->host);
+	struct ufs_hba *hba = shost_priv(sdev->host);
 
 	down(&hba->host_sem);
 	hba->shutting_down = true;
@@ -9967,27 +9965,16 @@ static void ufshcd_wl_shutdown(struct device *dev)
 		scsi_device_quiesce(sdev);
 	}
 	__ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM);
-}
 
-/**
- * ufshcd_shutdown - shutdown routine
- * @hba: per adapter instance
- *
- * This function would turn off both UFS device and UFS hba
- * regulators. It would also disable clocks.
- *
- * Returns 0 always to allow force shutdown even in case of errors.
- */
-int ufshcd_shutdown(struct ufs_hba *hba)
-{
+	/*
+	 * Next, turn off the UFS controller and the UFS regulators. Disable
+	 * clocks.
+	 */
 	if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba))
 		ufshcd_suspend(hba);
 
 	hba->is_powered = false;
-	/* allow force shutdown even in case of errors */
-	return 0;
 }
-EXPORT_SYMBOL(ufshcd_shutdown);
 
 /**
  * ufshcd_remove - de-allocate SCSI host and host memory space

drivers/ufs/host/cdns-pltfrm.c

@@ -328,7 +328,6 @@ static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
 static struct platform_driver cdns_ufs_pltfrm_driver = {
 	.probe	= cdns_ufs_pltfrm_probe,
 	.remove	= cdns_ufs_pltfrm_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver	= {
 		.name   = "cdns-ufshcd",
 		.pm     = &cdns_ufs_dev_pm_ops,

drivers/ufs/host/tc-dwc-g210-pci.c

@@ -32,15 +32,6 @@ static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
 	.link_startup_notify	= ufshcd_dwc_link_startup_notify,
 };
 
-/**
- * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
- * @pdev: pointer to PCI device handle
- */
-static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
-{
-	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
-}
-
 /**
  * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
  *		data structure memory
@@ -137,7 +128,6 @@ static struct pci_driver tc_dwc_g210_pci_driver = {
 	.id_table = tc_dwc_g210_pci_tbl,
 	.probe = tc_dwc_g210_pci_probe,
 	.remove = tc_dwc_g210_pci_remove,
-	.shutdown = tc_dwc_g210_pci_shutdown,
 	.driver = {
 		.pm = &tc_dwc_g210_pci_pm_ops
 	},

drivers/ufs/host/tc-dwc-g210-pltfrm.c

@@ -92,7 +92,6 @@ static const struct dev_pm_ops tc_dwc_g210_pltfm_pm_ops = {
 static struct platform_driver tc_dwc_g210_pltfm_driver = {
 	.probe		= tc_dwc_g210_pltfm_probe,
 	.remove		= tc_dwc_g210_pltfm_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver		= {
 		.name	= "tc-dwc-g210-pltfm",
 		.pm	= &tc_dwc_g210_pltfm_pm_ops,

drivers/ufs/host/ufs-exynos.c

@@ -1757,7 +1757,6 @@ static const struct dev_pm_ops exynos_ufs_pm_ops = {
 static struct platform_driver exynos_ufs_pltform = {
 	.probe	= exynos_ufs_probe,
 	.remove	= exynos_ufs_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver	= {
 		.name	= "exynos-ufshc",
 		.pm	= &exynos_ufs_pm_ops,

drivers/ufs/host/ufs-hisi.c

@@ -593,7 +593,6 @@ static const struct dev_pm_ops ufs_hisi_pm_ops = {
 static struct platform_driver ufs_hisi_pltform = {
 	.probe	= ufs_hisi_probe,
 	.remove	= ufs_hisi_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver	= {
 		.name	= "ufshcd-hisi",
 		.pm	= &ufs_hisi_pm_ops,

drivers/ufs/host/ufs-mediatek.c

@@ -1650,7 +1650,6 @@ static const struct dev_pm_ops ufs_mtk_pm_ops = {
 static struct platform_driver ufs_mtk_pltform = {
 	.probe      = ufs_mtk_probe,
 	.remove     = ufs_mtk_remove,
-	.shutdown   = ufshcd_pltfrm_shutdown,
 	.driver = {
 		.name   = "ufshcd-mtk",
 		.pm     = &ufs_mtk_pm_ops,

drivers/ufs/host/ufs-qcom.c

@@ -1723,7 +1723,6 @@ static const struct dev_pm_ops ufs_qcom_pm_ops = {
 static struct platform_driver ufs_qcom_pltform = {
 	.probe	= ufs_qcom_probe,
 	.remove	= ufs_qcom_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver	= {
 		.name	= "ufshcd-qcom",
 		.pm	= &ufs_qcom_pm_ops,

drivers/ufs/host/ufs-sprd.c

@@ -444,7 +444,6 @@ static const struct dev_pm_ops ufs_sprd_pm_ops = {
 static struct platform_driver ufs_sprd_pltform = {
 	.probe = ufs_sprd_probe,
 	.remove = ufs_sprd_remove,
-	.shutdown = ufshcd_pltfrm_shutdown,
 	.driver = {
 		.name = "ufshcd-sprd",
 		.pm = &ufs_sprd_pm_ops,

drivers/ufs/host/ufshcd-pci.c

@@ -504,15 +504,6 @@ static int ufshcd_pci_restore(struct device *dev)
 }
 #endif
 
-/**
- * ufshcd_pci_shutdown - main function to put the controller in reset state
- * @pdev: pointer to PCI device handle
- */
-static void ufshcd_pci_shutdown(struct pci_dev *pdev)
-{
-	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
-}
-
 /**
  * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
  *		data structure memory
@@ -618,7 +609,6 @@ static struct pci_driver ufshcd_pci_driver = {
 	.id_table = ufshcd_pci_tbl,
 	.probe = ufshcd_pci_probe,
 	.remove = ufshcd_pci_remove,
-	.shutdown = ufshcd_pci_shutdown,
 	.driver = {
 		.pm = &ufshcd_pci_pm_ops
 	},

drivers/ufs/host/ufshcd-pltfrm.c

@@ -190,12 +190,6 @@ static int ufshcd_parse_regulator_info(struct ufs_hba *hba)
 	return err;
 }
 
-void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
-{
-	ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
-}
-EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
-
 static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba)
 {
 	struct device *dev = hba->dev;

drivers/ufs/host/ufshcd-pltfrm.h

@@ -31,7 +31,6 @@ int ufshcd_get_pwr_dev_param(const struct ufs_dev_params *dev_param,
 void ufshcd_init_pwr_dev_param(struct ufs_dev_params *dev_param);
 int ufshcd_pltfrm_init(struct platform_device *pdev,
 		       const struct ufs_hba_variant_ops *vops);
-void ufshcd_pltfrm_shutdown(struct platform_device *pdev);
 int ufshcd_populate_vreg(struct device *dev, const char *name,
 			 struct ufs_vreg **out_vreg);
 

include/ufs/ufshcd.h

@@ -1277,7 +1277,6 @@ extern int ufshcd_system_freeze(struct device *dev);
 extern int ufshcd_system_thaw(struct device *dev);
 extern int ufshcd_system_restore(struct device *dev);
 #endif
-extern int ufshcd_shutdown(struct ufs_hba *hba);
 
 extern int ufshcd_dme_configure_adapt(struct ufs_hba *hba,
 				      int agreed_gear,