Subject: [PATCH 07/13] PCI: dwc: Drop the .set_num_vectors() host op

From: Rob Herring <[email-masked]>
Date: Wed, 28 Oct 2020 15:46:40 -0500

There's no reason for the .set_num_vectors() host op. Drivers needing a
non-default value can just initialize pcie_port.num_vectors directly.

Cc: Jingoo Han <[email-masked]>
Cc: Gustavo Pimentel <[email-masked]>
Cc: Lorenzo Pieralisi <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>
Cc: Thierry Reding <[email-masked]>
Cc: Jonathan Hunter <[email-masked]>
Cc: [email-masked]
Signed-off-by: Rob Herring <[email-masked]>
---
 .../pci/controller/dwc/pcie-designware-host.c | 19 ++++---------------
 .../pci/controller/dwc/pcie-designware-plat.c |  7 +------
 drivers/pci/controller/dwc/pcie-designware.h  |  1 -
 drivers/pci/controller/dwc/pcie-tegra194.c    |  7 +------
 4 files changed, 6 insertions(+), 28 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 265a48f1a0ae..1bd6a9762426 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -365,22 +365,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		pci->link_gen = of_pci_get_max_link_speed(np);
 
 	if (pci_msi_enabled()) {
-		/*
-		 * If a specific SoC driver needs to change the
-		 * default number of vectors, it needs to implement
-		 * the set_num_vectors callback.
-		 */
-		if (!pp->ops->set_num_vectors) {
+		if (!pp->num_vectors) {
 			pp->num_vectors = MSI_DEF_NUM_VECTORS;
-		} else {
-			pp->ops->set_num_vectors(pp);
-
-			if (pp->num_vectors > MAX_MSI_IRQS ||
-			    pp->num_vectors == 0) {
-				dev_err(dev,
-					"Invalid number of vectors\n");
-				return -EINVAL;
-			}
+		} else if (pp->num_vectors > MAX_MSI_IRQS) {
+			dev_err(dev, "Invalid number of vectors\n");
+			return -EINVAL;
 		}
 
 		if (!pp->ops->msi_host_init) {
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index 562a05e07b1d..13fede1d4157 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -44,14 +44,8 @@ static int dw_plat_pcie_host_init(struct pcie_port *pp)
 	return 0;
 }
 
-static void dw_plat_set_num_vectors(struct pcie_port *pp)
-{
-	pp->num_vectors = MAX_MSI_IRQS;
-}
-
 static const struct dw_pcie_host_ops dw_plat_pcie_host_ops = {
 	.host_init = dw_plat_pcie_host_init,
-	.set_num_vectors = dw_plat_set_num_vectors,
 };
 
 static int dw_plat_pcie_establish_link(struct dw_pcie *pci)
@@ -128,6 +122,7 @@ static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
 			return pp->msi_irq;
 	}
 
+	pp->num_vectors = MAX_MSI_IRQS;
 	pp->ops = &dw_plat_pcie_host_ops;
 
 	ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index ed19c34dd0fe..96382dcb2859 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -171,7 +171,6 @@ enum dw_pcie_device_mode {
 
 struct dw_pcie_host_ops {
 	int (*host_init)(struct pcie_port *pp);
-	void (*set_num_vectors)(struct pcie_port *pp);
 	int (*msi_host_init)(struct pcie_port *pp);
 };
 
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f8fca6794282..5e2841f58700 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -990,11 +990,6 @@ static int tegra_pcie_dw_link_up(struct dw_pcie *pci)
 	return !!(val & PCI_EXP_LNKSTA_DLLLA);
 }
 
-static void tegra_pcie_set_msi_vec_num(struct pcie_port *pp)
-{
-	pp->num_vectors = MAX_MSI_IRQS;
-}
-
 static int tegra_pcie_dw_start_link(struct dw_pcie *pci)
 {
 	struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
@@ -1019,7 +1014,6 @@ static const struct dw_pcie_ops tegra_dw_pcie_ops = {
 
 static struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
 	.host_init = tegra_pcie_dw_host_init,
-	.set_num_vectors = tegra_pcie_set_msi_vec_num,
 };
 
 static void tegra_pcie_disable_phy(struct tegra_pcie_dw *pcie)
@@ -1995,6 +1989,7 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
 	pci->n_fts[1] = FTS_VAL;
 
 	pp = &pci->pp;
+	pp->num_vectors = MAX_MSI_IRQS;
 	pcie->dev = &pdev->dev;
 	pcie->mode = (enum dw_pcie_device_mode)data->mode;
 
-- 
2.25.1