[PATCH] PCI: dwc: Fix crashes seen due to missing assignments

[Guenter Roeck]

Fix the following crash, seen in dwc/pci-imx6.

Unable to handle kernel NULL pointer dereference at virtual address 00000070
pgd = c0004000
[00000070] *pgd=00000000
Internal error: Oops: 805 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.10.0-09686-g9e31489 #1
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
task: cb850000 task.stack: cb84e000
PC is at imx6_pcie_probe+0x2f4/0x414
...

While at it, fix the same problem in various drivers instead of waiting
for individual crash reports.

The change in the imx6 driver was tested with qemu. The changes in other
drivers are based on code inspection and have been compile tested only.

Fixes: 442ec4c04d12 ("PCI: dwc: all: Split struct pcie_port into ...")
Cc: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
 drivers/pci/dwc/pci-exynos.c     | 1 +
 drivers/pci/dwc/pci-imx6.c       | 1 +
 drivers/pci/dwc/pci-keystone.c   | 2 ++
 drivers/pci/dwc/pci-layerscape.c | 2 ++
 drivers/pci/dwc/pcie-armada8k.c  | 2 ++
 drivers/pci/dwc/pcie-artpec6.c   | 2 ++
 drivers/pci/dwc/pcie-hisi.c      | 2 ++
 drivers/pci/dwc/pcie-qcom.c      | 2 ++
 drivers/pci/dwc/pcie-spear13xx.c | 2 ++
 9 files changed, 16 insertions(+)

diff --git a/drivers/pci/dwc/pci-exynos.c b/drivers/pci/dwc/pci-exynos.c
index 001c91a945aa..993b650ef275 100644
--- a/drivers/pci/dwc/pci-exynos.c
+++ b/drivers/pci/dwc/pci-exynos.c
@@ -668,6 +668,7 @@ static int __init exynos_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
+	ep->pci = pci;
 	ep->ops = (const struct exynos_pcie_ops *)
 		of_device_get_match_data(dev);
 
diff --git a/drivers/pci/dwc/pci-imx6.c b/drivers/pci/dwc/pci-imx6.c
index 3ab6761db9e8..801e46cd266d 100644
--- a/drivers/pci/dwc/pci-imx6.c
+++ b/drivers/pci/dwc/pci-imx6.c
@@ -605,6 +605,7 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
+	imx6_pcie->pci = pci;
 	imx6_pcie->variant =
 		(enum imx6_pcie_variants)of_device_get_match_data(dev);
 
diff --git a/drivers/pci/dwc/pci-keystone.c b/drivers/pci/dwc/pci-keystone.c
index 8dc66409182d..fcc9723bad6e 100644
--- a/drivers/pci/dwc/pci-keystone.c
+++ b/drivers/pci/dwc/pci-keystone.c
@@ -401,6 +401,8 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
+	ks_pcie->pci = pci;
+
 	/* initialize SerDes Phy if present */
 	phy = devm_phy_get(dev, "pcie-phy");
 	if (PTR_ERR_OR_ZERO(phy) == -EPROBE_DEFER)
diff --git a/drivers/pci/dwc/pci-layerscape.c b/drivers/pci/dwc/pci-layerscape.c
index 175c09e3a932..c32e392a0ae6 100644
--- a/drivers/pci/dwc/pci-layerscape.c
+++ b/drivers/pci/dwc/pci-layerscape.c
@@ -280,6 +280,8 @@ static int __init ls_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = pcie->drvdata->dw_pcie_ops;
 
+	pcie->pci = pci;
+
 	dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
 	pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
 	if (IS_ERR(pci->dbi_base))
diff --git a/drivers/pci/dwc/pcie-armada8k.c b/drivers/pci/dwc/pcie-armada8k.c
index 66bac6fbfa9f..f110e3b24a26 100644
--- a/drivers/pci/dwc/pcie-armada8k.c
+++ b/drivers/pci/dwc/pcie-armada8k.c
@@ -220,6 +220,8 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
+	pcie->pci = pci;
+
 	pcie->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(pcie->clk))
 		return PTR_ERR(pcie->clk);
diff --git a/drivers/pci/dwc/pcie-artpec6.c b/drivers/pci/dwc/pcie-artpec6.c
index 59ecc9e66436..fcd3ef845883 100644
--- a/drivers/pci/dwc/pcie-artpec6.c
+++ b/drivers/pci/dwc/pcie-artpec6.c
@@ -253,6 +253,8 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 
+	artpec6_pcie->pci = pci;
+
 	dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
 	pci->dbi_base = devm_ioremap_resource(dev, dbi_base);
 	if (IS_ERR(pci->dbi_base))
diff --git a/drivers/pci/dwc/pcie-hisi.c b/drivers/pci/dwc/pcie-hisi.c
index e3e4fedd9f68..fd66a3199db7 100644
--- a/drivers/pci/dwc/pcie-hisi.c
+++ b/drivers/pci/dwc/pcie-hisi.c
@@ -284,6 +284,8 @@ static int hisi_pcie_probe(struct platform_device *pdev)
 
 	driver = dev->driver;
 
+	hisi_pcie->pci = pci;
+
 	hisi_pcie->soc_ops = of_device_get_match_data(dev);
 
 	hisi_pcie->subctrl =
diff --git a/drivers/pci/dwc/pcie-qcom.c b/drivers/pci/dwc/pcie-qcom.c
index e36abe0d9d6f..67eb7f5926dd 100644
--- a/drivers/pci/dwc/pcie-qcom.c
+++ b/drivers/pci/dwc/pcie-qcom.c
@@ -686,6 +686,8 @@ static int qcom_pcie_probe(struct platform_device *pdev)
 	pci->ops = &dw_pcie_ops;
 	pp = &pci->pp;
 
+	pcie->pci = pci;
+
 	pcie->ops = (struct qcom_pcie_ops *)of_device_get_match_data(dev);
 
 	pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_LOW);
diff --git a/drivers/pci/dwc/pcie-spear13xx.c b/drivers/pci/dwc/pcie-spear13xx.c
index 348f9c5e0433..eaa4ea8e2ea4 100644
--- a/drivers/pci/dwc/pcie-spear13xx.c
+++ b/drivers/pci/dwc/pcie-spear13xx.c
@@ -247,6 +247,8 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
 
+	spear13xx_pcie->pci = pci;
+
 	spear13xx_pcie->phy = devm_phy_get(dev, "pcie-phy");
 	if (IS_ERR(spear13xx_pcie->phy)) {
 		ret = PTR_ERR(spear13xx_pcie->phy);
-- 
2.7.4