linux-kernel - Re: [PATCH 2/2] PCI: Versal CPM: Add support for Versal CPM Root Port driver

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Message-ID: <20200105184953.GF3889@kadam>
Date:   Sun, 5 Jan 2020 21:49:53 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     kbuild@...ts.01.org,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
Cc:     kbuild-all@...ts.01.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, bhelgaas@...gle.com,
        rgummal@...inx.com,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
Subject: Re: [PATCH 2/2] PCI: Versal CPM: Add support for Versal CPM Root
 Port driver

Hi Bharat,

Thank you for the patch! Perhaps something to improve:

url:    https://github.com/0day-ci/linux/commits/Bharat-Kumar-Gogada/Adding-support-for-versal-CPM-as-Root-Port-driver/20191223-193219
base:   https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>

New smatch warnings:
drivers/pci/controller/pcie-xilinx-cpm.c:330 xilinx_cpm_pcie_init_irq_domain() warn: passing zero to 'PTR_ERR'

Old smatch warnings:
drivers/pci/controller/pcie-xilinx-cpm.c:338 xilinx_cpm_pcie_init_irq_domain() warn: passing zero to 'PTR_ERR'

# https://github.com/0day-ci/linux/commit/f107713acb796e598f16a23b33af74fa382921b2
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout f107713acb796e598f16a23b33af74fa382921b2
vim +/PTR_ERR +330 drivers/pci/controller/pcie-xilinx-cpm.c

f107713acb796e Bharat Kumar Gogada 2019-12-20  320  static int xilinx_cpm_pcie_init_irq_domain(struct xilinx_cpm_pcie_port *port)
f107713acb796e Bharat Kumar Gogada 2019-12-20  321  {
f107713acb796e Bharat Kumar Gogada 2019-12-20  322  	struct device *dev = port->dev;
f107713acb796e Bharat Kumar Gogada 2019-12-20  323  	struct device_node *node = dev->of_node;
f107713acb796e Bharat Kumar Gogada 2019-12-20  324  	struct device_node *pcie_intc_node;
f107713acb796e Bharat Kumar Gogada 2019-12-20  325  
f107713acb796e Bharat Kumar Gogada 2019-12-20  326  	/* Setup INTx */
f107713acb796e Bharat Kumar Gogada 2019-12-20  327  	pcie_intc_node = of_get_next_child(node, NULL);
f107713acb796e Bharat Kumar Gogada 2019-12-20  328  	if (!pcie_intc_node) {
                                                            ^^^^^^^^^^^^^^^

f107713acb796e Bharat Kumar Gogada 2019-12-20  329  		dev_err(dev, "No PCIe Intc node found\n");
f107713acb796e Bharat Kumar Gogada 2019-12-20 @330  		return PTR_ERR(pcie_intc_node);
                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(This means success).

f107713acb796e Bharat Kumar Gogada 2019-12-20  331  	}
f107713acb796e Bharat Kumar Gogada 2019-12-20  332  
f107713acb796e Bharat Kumar Gogada 2019-12-20  333  	port->leg_domain = irq_domain_add_linear(pcie_intc_node, INTX_NUM,
f107713acb796e Bharat Kumar Gogada 2019-12-20  334  						 &intx_domain_ops,
f107713acb796e Bharat Kumar Gogada 2019-12-20  335  						 port);
f107713acb796e Bharat Kumar Gogada 2019-12-20  336  	if (!port->leg_domain) {
f107713acb796e Bharat Kumar Gogada 2019-12-20  337  		dev_err(dev, "Failed to get a INTx IRQ domain\n");
f107713acb796e Bharat Kumar Gogada 2019-12-20  338  		return PTR_ERR(port->leg_domain);
f107713acb796e Bharat Kumar Gogada 2019-12-20  339  	}
f107713acb796e Bharat Kumar Gogada 2019-12-20  340  
f107713acb796e Bharat Kumar Gogada 2019-12-20  341  	return 0;
f107713acb796e Bharat Kumar Gogada 2019-12-20  342  }

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0-DAY kernel test infrastructure                 Open Source Technology Center
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