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From: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
To: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, lorenzo.pieralisi@arm.com,
	robh+dt@kernel.org, bhelgaas@google.com, shawnguo@kernel.org,
	leoyang.li@nxp.com, gustavo.pimentel@synopsys.com
Cc: minghuan.Lian@nxp.com, mingkai.hu@nxp.com, roy.zang@nxp.com,
	Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Subject: [PATCHv2 1/7] PCI: dwc: Fix a bug of the case dw_pci->ops is NULL
Date: Tue, 27 Oct 2020 15:29:55 +0800	[thread overview]
Message-ID: <20201027073001.41808-2-Zhiqiang.Hou@nxp.com> (raw)
In-Reply-To: <20201027073001.41808-1-Zhiqiang.Hou@nxp.com>

From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>

The dw_pci->ops may be a NULL, and fix it by adding one more check.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
V2:
 - Rebased the patch against the latest code.

 drivers/pci/controller/dwc/pcie-designware.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index c2dea8fc97c8..7a5024450c4d 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -141,7 +141,7 @@ u32 dw_pcie_read_dbi(struct dw_pcie *pci, u32 reg, size_t size)
 	int ret;
 	u32 val;
 
-	if (pci->ops->read_dbi)
+	if (pci->ops && pci->ops->read_dbi)
 		return pci->ops->read_dbi(pci, pci->dbi_base, reg, size);
 
 	ret = dw_pcie_read(pci->dbi_base + reg, size, &val);
@@ -156,7 +156,7 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
 {
 	int ret;
 
-	if (pci->ops->write_dbi) {
+	if (pci->ops && pci->ops->write_dbi) {
 		pci->ops->write_dbi(pci, pci->dbi_base, reg, size, val);
 		return;
 	}
@@ -171,7 +171,7 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val)
 {
 	int ret;
 
-	if (pci->ops->write_dbi2) {
+	if (pci->ops && pci->ops->write_dbi2) {
 		pci->ops->write_dbi2(pci, pci->dbi_base2, reg, size, val);
 		return;
 	}
@@ -186,7 +186,7 @@ static u32 dw_pcie_readl_atu(struct dw_pcie *pci, u32 reg)
 	int ret;
 	u32 val;
 
-	if (pci->ops->read_dbi)
+	if (pci->ops && pci->ops->read_dbi)
 		return pci->ops->read_dbi(pci, pci->atu_base, reg, 4);
 
 	ret = dw_pcie_read(pci->atu_base + reg, 4, &val);
@@ -200,7 +200,7 @@ static void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val)
 {
 	int ret;
 
-	if (pci->ops->write_dbi) {
+	if (pci->ops && pci->ops->write_dbi) {
 		pci->ops->write_dbi(pci, pci->atu_base, reg, 4, val);
 		return;
 	}
@@ -271,7 +271,7 @@ static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no,
 {
 	u32 retries, val;
 
-	if (pci->ops->cpu_addr_fixup)
+	if (pci->ops && pci->ops->cpu_addr_fixup)
 		cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr);
 
 	if (pci->iatu_unroll_enabled) {
@@ -479,7 +479,7 @@ int dw_pcie_link_up(struct dw_pcie *pci)
 {
 	u32 val;
 
-	if (pci->ops->link_up)
+	if (pci->ops && pci->ops->link_up)
 		return pci->ops->link_up(pci);
 
 	val = readl(pci->dbi_base + PCIE_PORT_DEBUG1);
-- 
2.17.1


  reply	other threads:[~2020-10-27  7:41 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-27  7:29 [PATCHv2 0/7] PCI: layerscape: Add power management support Zhiqiang Hou
2020-10-27  7:29 ` Zhiqiang Hou [this message]
2020-10-27  7:29 ` [PATCHv2 2/7] PCI: layerscape: Change to use the DWC common link-up check function Zhiqiang Hou
2020-10-27  7:29 ` [PATCHv2 3/7] dt-bindings: pci: layerscape-pci: Add a optional property big-endian Zhiqiang Hou
2020-10-27  7:29 ` [PATCHv2 4/7] arm64: dts: layerscape: Add big-endian property for PCIe nodes Zhiqiang Hou
2020-10-27  7:29 ` [PATCHv2 5/7] dt-bindings: pci: layerscape-pci: Update the description of SCFG property Zhiqiang Hou
2020-10-27  7:30 ` [PATCHv2 6/7] arm64: dts: ls1043a: Add SCFG phandle for PCIe nodes Zhiqiang Hou
2020-10-27  7:30 ` [PATCHv2 7/7] PCI: layerscape: Add power management support Zhiqiang Hou

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