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Commit f52e5629 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Bjorn Helgaas
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PCI: Allow access to VPD attributes with size 0



It is not always possible to determine the actual size of the VPD
data, so allow access to them if the size is set to '0'.

Tested-by: default avatarShane Seymour <shane.seymour@hpe.com>
Tested-by: default avatarBabu Moger <babu.moger@oracle.com>
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
parent 9eb45d5c
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+12 −8
Original line number Diff line number Diff line
@@ -769,10 +769,12 @@ static ssize_t read_vpd_attr(struct file *filp, struct kobject *kobj,
{
	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));

	if (bin_attr->size > 0) {
		if (off > bin_attr->size)
			count = 0;
		else if (count > bin_attr->size - off)
			count = bin_attr->size - off;
	}

	return pci_read_vpd(dev, off, count, buf);
}
@@ -783,10 +785,12 @@ static ssize_t write_vpd_attr(struct file *filp, struct kobject *kobj,
{
	struct pci_dev *dev = to_pci_dev(kobj_to_dev(kobj));

	if (bin_attr->size > 0) {
		if (off > bin_attr->size)
			count = 0;
		else if (count > bin_attr->size - off)
			count = bin_attr->size - off;
	}

	return pci_write_vpd(dev, off, count, buf);
}