linux-kernel - [PATCH AUTOSEL 4.19 108/167] PCI: dwc: Use devm_pci_alloc_host

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Message-Id: <20190903162519.7136-108-sashal@kernel.org>
Date:   Tue,  3 Sep 2019 12:24:20 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Sasha Levin <sashal@...nel.org>, linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 108/167] PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify code

From: Jisheng Zhang <Jisheng.Zhang@...aptics.com>

[ Upstream commit e6fdd3bf5aecd8615f31a5128775b9abcf3e0d86 ]

Use devm_pci_alloc_host_bridge() to simplify the error code path.  This
also fixes a leak in the dw_pcie_host_init() error path.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
CC: stable@...r.kernel.org	# v4.13+
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../pci/controller/dwc/pcie-designware-host.c | 21 +++++++------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index acd50920c2ffd..b57ee79f6d699 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -356,7 +356,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		dev_err(dev, "Missing *config* reg space\n");
 	}
 
-	bridge = pci_alloc_host_bridge(0);
+	bridge = devm_pci_alloc_host_bridge(dev, 0);
 	if (!bridge)
 		return -ENOMEM;
 
@@ -367,7 +367,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 
 	ret = devm_request_pci_bus_resources(dev, &bridge->windows);
 	if (ret)
-		goto error;
+		return ret;
 
 	/* Get the I/O and memory ranges from DT */
 	resource_list_for_each_entry_safe(win, tmp, &bridge->windows) {
@@ -411,8 +411,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 						resource_size(pp->cfg));
 		if (!pci->dbi_base) {
 			dev_err(dev, "Error with ioremap\n");
-			ret = -ENOMEM;
-			goto error;
+			return -ENOMEM;
 		}
 	}
 
@@ -423,8 +422,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 					pp->cfg0_base, pp->cfg0_size);
 		if (!pp->va_cfg0_base) {
 			dev_err(dev, "Error with ioremap in function\n");
-			ret = -ENOMEM;
-			goto error;
+			return -ENOMEM;
 		}
 	}
 
@@ -434,8 +432,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 						pp->cfg1_size);
 		if (!pp->va_cfg1_base) {
 			dev_err(dev, "Error with ioremap\n");
-			ret = -ENOMEM;
-			goto error;
+			return -ENOMEM;
 		}
 	}
 
@@ -458,14 +455,14 @@ int dw_pcie_host_init(struct pcie_port *pp)
 			    pp->num_vectors == 0) {
 				dev_err(dev,
 					"Invalid number of vectors\n");
-				goto error;
+				return -EINVAL;
 			}
 		}
 
 		if (!pp->ops->msi_host_init) {
 			ret = dw_pcie_allocate_domains(pp);
 			if (ret)
-				goto error;
+				return ret;
 
 			if (pp->msi_irq)
 				irq_set_chained_handler_and_data(pp->msi_irq,
@@ -474,7 +471,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 		} else {
 			ret = pp->ops->msi_host_init(pp);
 			if (ret < 0)
-				goto error;
+				return ret;
 		}
 	}
 
@@ -514,8 +511,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
 err_free_msi:
 	if (pci_msi_enabled() && !pp->ops->msi_host_init)
 		dw_pcie_free_msi(pp);
-error:
-	pci_free_host_bridge(bridge);
 	return ret;
 }
 
-- 
2.20.1