linux-kernel - Re: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret'

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Date:   Thu, 16 Apr 2020 09:56:47 -0700
From:   Tom Rix <trix@...hat.com>
To:     "Wu, Hao" <hao.wu@...el.com>, "Xu, Yilun" <yilun.xu@...el.com>,
        "mdf@...nel.org" <mdf@...nel.org>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     "bhu@...hat.com" <bhu@...hat.com>
Subject: Re: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret'

Please check the scope.

On linus/master, the result of this change looks like

static int cci_pci_sriov_configure(struct pci_dev *pcidev, int num_vfs)
{
    struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
    struct dfl_fpga_cdev *cdev = drvdata->cdev;

    if (!num_vfs) {
        /*
         * disable SRIOV and then put released ports back to default
         * PF access mode.
         */
        pci_disable_sriov(pcidev);

        dfl_fpga_cdev_config_ports_pf(cdev);

    } else {
        int ret; <--- defined here

        /*
         * before enable SRIOV, put released ports into VF access mode
         * first of all.
         */
        ret = dfl_fpga_cdev_config_ports_vf(cdev, num_vfs);
        if (ret)
            return ret;

        ret = pci_enable_sriov(pcidev, num_vfs);
        if (ret)
            dfl_fpga_cdev_config_ports_pf(cdev);
    }

    return ret;  <---- not in scope, not defined here
}

Tom