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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7eff2e7a8b
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
38 lines
926 B
C
38 lines
926 B
C
#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/module.h>
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#include "pci.h"
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int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct pci_dev *pdev;
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if (!dev)
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return -ENODEV;
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pdev = to_pci_dev(dev);
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if (!pdev)
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return -ENODEV;
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if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class))
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return -ENOMEM;
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if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
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return -ENOMEM;
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if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
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pdev->subsystem_device))
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return -ENOMEM;
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if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev)))
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return -ENOMEM;
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if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x",
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pdev->vendor, pdev->device,
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pdev->subsystem_vendor, pdev->subsystem_device,
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(u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
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(u8)(pdev->class)))
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return -ENOMEM;
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return 0;
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}
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