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From: Niklas Cassel <niklas.cassel@axis.com>
To: <bhelgaas@google.com>, <jingoohan1@gmail.com>,
	<Joao.Pinto@synopsys.com>, <kishon@ti.com>
Cc: <linux-arm-kernel@axis.com>, <linux-pci@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, Niklas Cassel <niklass@axis.com>
Subject: [PATCH] PCI: dwc: fix crash seen due to missing ops
Date: Tue, 21 Mar 2017 15:43:54 +0100	[thread overview]
Message-ID: <20170321144354.15452-1-niklass@axis.com> (raw)

From: Niklas Cassel <niklas.cassel@axis.com>

Fix the following crash, seen in dwc/pcie-artpec6.

  Unable to handle kernel NULL pointer dereference at virtual address 00000004
  pgd = c0204000
  [00000004] *pgd=00000000
  Internal error: Oops: 5 [#1] SMP ARM
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.0-rc3-next-20170321 #1
  Hardware name: Axis ARTPEC-6 Platform
  task: db098000 task.stack: db096000
  PC is at dw_pcie_writel_dbi+0x2c/0xd0
  ...

While at it, fix the same problem for pcie-designware-plat.

Fixes: 442ec4c04d12 ("PCI: dwc: all: Split struct pcie_port into host-only and core structures")
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
 drivers/pci/dwc/pcie-artpec6.c         | 4 ++++
 drivers/pci/dwc/pcie-designware-plat.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/pci/dwc/pcie-artpec6.c b/drivers/pci/dwc/pcie-artpec6.c
index fcd3ef845883..6d23683c0892 100644
--- a/drivers/pci/dwc/pcie-artpec6.c
+++ b/drivers/pci/dwc/pcie-artpec6.c
@@ -234,6 +234,9 @@ static int artpec6_add_pcie_port(struct artpec6_pcie *artpec6_pcie,
 	return 0;
 }
 
+static const struct dw_pcie_ops dw_pcie_ops = {
+};
+
 static int artpec6_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -252,6 +255,7 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	pci->dev = dev;
+	pci->ops = &dw_pcie_ops;
 
 	artpec6_pcie->pci = pci;
 
diff --git a/drivers/pci/dwc/pcie-designware-plat.c b/drivers/pci/dwc/pcie-designware-plat.c
index b6c832ba39dd..f20d494922ab 100644
--- a/drivers/pci/dwc/pcie-designware-plat.c
+++ b/drivers/pci/dwc/pcie-designware-plat.c
@@ -86,6 +86,9 @@ static int dw_plat_add_pcie_port(struct pcie_port *pp,
 	return 0;
 }
 
+static const struct dw_pcie_ops dw_pcie_ops = {
+};
+
 static int dw_plat_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -103,6 +106,7 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	pci->dev = dev;
+	pci->ops = &dw_pcie_ops;
 
 	dw_plat_pcie->pci = pci;
 
-- 
2.11.0

             reply	other threads:[~2017-03-21 14:44 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-21 14:43 Niklas Cassel [this message]
2017-03-22 15:47 ` [PATCH] PCI: dwc: fix crash seen due to missing ops Joao Pinto
2017-03-23  7:40   ` Niklas Cassel
2017-03-27  5:43     ` Kishon Vijay Abraham I
2017-03-29 11:21       ` Niklas Cassel
     [not found]   ` <e6cf73c0-f930-c29a-8caa-843320ec5f8a@axis.com>
2017-03-27 16:26     ` Joao Pinto
2017-04-03 23:15 ` Bjorn Helgaas
2017-04-04  7:54   ` Niklas Cassel
2017-04-04 13:54     ` Bjorn Helgaas

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