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authorAman Sharma <amanharitsh123@gmail.com>2020-03-11 22:19:02 +0300
committerBjorn Helgaas <bhelgaas@google.com>2020-05-12 16:14:43 +0300
commit0584bff09629666eea97c7ac428e55b00df211f5 (patch)
tree0f1ffb119ca31d5fbb5b996a976eafaa120b98c7
parenta85a6c86c25be2d2a5f9c31491f612ce0edc7869 (diff)
downloadlinux-0584bff09629666eea97c7ac428e55b00df211f5.tar.xz
PCI: Check for platform_get_irq() failure consistently
The platform_get_irq*() interfaces return either a negative error number or a valid IRQ. 0 is not a valid return value, so check for "< 0" to detect failure as recommended by the function documentation. On failure, return the error number from platform_get_irq*() instead of making up a new one. Link: https://lore.kernel.org/r/cover.1583952275.git.amanharitsh123@gmail.com [bhelgaas: commit log, squash into one patch] Signed-off-by: Aman Sharma <amanharitsh123@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Richard Zhu <hongxing.zhu@nxp.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Karthikeyan Mitran <m.karthikeyan@mobiveil.co.in> Cc: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: Ryder Lee <ryder.lee@mediatek.com> Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
-rw-r--r--drivers/pci/controller/dwc/pci-imx6.c4
-rw-r--r--drivers/pci/controller/dwc/pcie-tegra194.c4
-rw-r--r--drivers/pci/controller/mobiveil/pcie-mobiveil-host.c4
-rw-r--r--drivers/pci/controller/pci-aardvark.c3
-rw-r--r--drivers/pci/controller/pci-v3-semi.c4
-rw-r--r--drivers/pci/controller/pcie-mediatek.c3
-rw-r--r--drivers/pci/controller/pcie-tango.c4
7 files changed, 16 insertions, 10 deletions
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index acfbd34032a8..8f08ae53f53e 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -868,9 +868,9 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
if (IS_ENABLED(CONFIG_PCI_MSI)) {
pp->msi_irq = platform_get_irq_byname(pdev, "msi");
- if (pp->msi_irq <= 0) {
+ if (pp->msi_irq < 0) {
dev_err(dev, "failed to get MSI irq\n");
- return -ENODEV;
+ return pp->msi_irq;
}
}
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index ae30a2fd3716..f1f945cc7bcb 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -2190,9 +2190,9 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
}
pp->irq = platform_get_irq_byname(pdev, "intr");
- if (!pp->irq) {
+ if (pp->irq < 0) {
dev_err(dev, "Failed to get \"intr\" interrupt\n");
- return -ENODEV;
+ return pp->irq;
}
pcie->bpmp = tegra_bpmp_get(dev);
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index a94be264240f..5907baa9b1f2 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -522,9 +522,9 @@ static int mobiveil_pcie_integrated_interrupt_init(struct mobiveil_pcie *pcie)
mobiveil_pcie_enable_msi(pcie);
rp->irq = platform_get_irq(pdev, 0);
- if (rp->irq <= 0) {
+ if (rp->irq < 0) {
dev_err(dev, "failed to map IRQ: %d\n", rp->irq);
- return -ENODEV;
+ return rp->irq;
}
/* initialize the IRQ domains */
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
index 2a20b649f40c..40a4257f0df1 100644
--- a/drivers/pci/controller/pci-aardvark.c
+++ b/drivers/pci/controller/pci-aardvark.c
@@ -973,6 +973,9 @@ static int advk_pcie_probe(struct platform_device *pdev)
return PTR_ERR(pcie->base);
irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
ret = devm_request_irq(dev, irq, advk_pcie_irq_handler,
IRQF_SHARED | IRQF_NO_THREAD, "advk-pcie",
pcie);
diff --git a/drivers/pci/controller/pci-v3-semi.c b/drivers/pci/controller/pci-v3-semi.c
index bd05221f5a22..a5bf945d2eda 100644
--- a/drivers/pci/controller/pci-v3-semi.c
+++ b/drivers/pci/controller/pci-v3-semi.c
@@ -777,9 +777,9 @@ static int v3_pci_probe(struct platform_device *pdev)
/* Get and request error IRQ resource */
irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
+ if (irq < 0) {
dev_err(dev, "unable to obtain PCIv3 error IRQ\n");
- return -ENODEV;
+ return irq;
}
ret = devm_request_irq(dev, irq, v3_irq, 0,
"PCIv3 error", v3);
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index cb982891b22b..ebfa7d5a4e2d 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -651,6 +651,9 @@ static int mtk_pcie_setup_irq(struct mtk_pcie_port *port,
}
port->irq = platform_get_irq(pdev, port->slot);
+ if (port->irq < 0)
+ return port->irq;
+
irq_set_chained_handler_and_data(port->irq,
mtk_pcie_intr_handler, port);
diff --git a/drivers/pci/controller/pcie-tango.c b/drivers/pci/controller/pcie-tango.c
index 21a208da3f59..18c2c4313eb5 100644
--- a/drivers/pci/controller/pcie-tango.c
+++ b/drivers/pci/controller/pcie-tango.c
@@ -273,9 +273,9 @@ static int tango_pcie_probe(struct platform_device *pdev)
writel_relaxed(0, pcie->base + SMP8759_ENABLE + offset);
virq = platform_get_irq(pdev, 1);
- if (virq <= 0) {
+ if (virq < 0) {
dev_err(dev, "Failed to map IRQ\n");
- return -ENXIO;
+ return virq;
}
irq_dom = irq_domain_create_linear(fwnode, MSI_MAX, &dom_ops, pcie);