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'.
Cc: Alexander Duyck <alexander.duyck@xxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/pci/pci-sysfs.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 95d9e7b..a730f54 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -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 (off > bin_attr->size)
- count = 0;
- else if (count > bin_attr->size - off)
- count = bin_attr->size - off;
+ 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 (off > bin_attr->size)
- count = 0;
- else if (count > bin_attr->size - off)
- count = bin_attr->size - off;
+ 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);
}
--
1.8.5.6
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