return off ?: PCI_VPD_SZ_INVALID;
}
+static bool pci_vpd_available(struct pci_dev *dev)
+{
+ struct pci_vpd *vpd = &dev->vpd;
+
+ if (!vpd->cap)
+ return false;
+
+ if (vpd->len == 0) {
+ vpd->len = pci_vpd_size(dev);
+ if (vpd->len == PCI_VPD_SZ_INVALID) {
+ vpd->cap = 0;
+ return false;
+ }
+ }
+
+ return true;
+}
+
/*
* Wait for last operation to complete.
* This code has to spin since there is no other notification from the PCI
loff_t end = pos + count;
u8 *buf = arg;
- if (!vpd->cap)
+ if (!pci_vpd_available(dev))
return -ENODEV;
if (pos < 0)
loff_t end = pos + count;
int ret = 0;
- if (!vpd->cap)
+ if (!pci_vpd_available(dev))
return -ENODEV;
if (pos < 0 || (pos & 3) || (count & 3))
void pci_vpd_init(struct pci_dev *dev)
{
+ if (dev->vpd.len == PCI_VPD_SZ_INVALID)
+ return;
+
dev->vpd.cap = pci_find_capability(dev, PCI_CAP_ID_VPD);
mutex_init(&dev->vpd.lock);
-
- if (!dev->vpd.len)
- dev->vpd.len = pci_vpd_size(dev);
-
- if (dev->vpd.len == PCI_VPD_SZ_INVALID)
- dev->vpd.cap = 0;
}
static ssize_t vpd_read(struct file *filp, struct kobject *kobj,
void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size)
{
- unsigned int len = dev->vpd.len;
+ unsigned int len;
void *buf;
int cnt;
- if (!dev->vpd.cap)
+ if (!pci_vpd_available(dev))
return ERR_PTR(-ENODEV);
+ len = dev->vpd.len;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
return ERR_PTR(-ENOMEM);