1 files changed, 95 insertions, 14 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index f5b0b622c189..ae9a7695be97 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -343,6 +343,58 @@ pci_write_config(struct kobject *kobj, struct bin_attribute *bin_attr,
         return count;
 }
 
+static ssize_t
+pci_read_vpd(struct kobject *kobj, struct bin_attribute *bin_attr,
+             char *buf, loff_t off, size_t count)
+{
+        struct pci_dev *dev =
+                to_pci_dev(container_of(kobj, struct device, kobj));
+        int end;
+        int ret;
+
+        if (off > bin_attr->size)
+                count = 0;
+        else if (count > bin_attr->size - off)
+                count = bin_attr->size - off;
+        end = off + count;
+
+        while (off < end) {
+                ret = dev->vpd->ops->read(dev, off, end - off, buf);
+                if (ret < 0)
+                        return ret;
+                buf += ret;
+                off += ret;
+        }
+
+        return count;
+}
+
+static ssize_t
+pci_write_vpd(struct kobject *kobj, struct bin_attribute *bin_attr,
+              char *buf, loff_t off, size_t count)
+{
+        struct pci_dev *dev =
+                to_pci_dev(container_of(kobj, struct device, kobj));
+        int end;
+        int ret;
+
+        if (off > bin_attr->size)
+                count = 0;
+        else if (count > bin_attr->size - off)
+                count = bin_attr->size - off;
+        end = off + count;
+
+        while (off < end) {
+                ret = dev->vpd->ops->write(dev, off, end - off, buf);
+                if (ret < 0)
+                        return ret;
+                buf += ret;
+                off += ret;
+        }
+
+        return count;
+}
+
 #ifdef HAVE_PCI_LEGACY
 /**
  * pci_read_legacy_io - read byte(s) from legacy I/O port space
@@ -611,7 +663,7 @@ int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
 
 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 {
-        struct bin_attribute *rom_attr = NULL;
+        struct bin_attribute *attr = NULL;
         int retval;
 
         if (!sysfs_initialized)
@@ -624,22 +676,41 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
         if (retval)
                 goto err;
 
+        /* If the device has VPD, try to expose it in sysfs. */
+        if (pdev->vpd) {
+                attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+                if (attr) {
+                        pdev->vpd->attr = attr;
+                        attr->size = pdev->vpd->ops->get_size(pdev);
+                        attr->attr.name = "vpd";
+                        attr->attr.mode = S_IRUGO | S_IWUSR;
+                        attr->read = pci_read_vpd;
+                        attr->write = pci_write_vpd;
+                        retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
+                        if (retval)
+                                goto err_vpd;
+                } else {
+                        retval = -ENOMEM;
+                        goto err_config_file;
+                }
+        }
+
         retval = pci_create_resource_files(pdev);
         if (retval)
-                goto err_bin_file;
+                goto err_vpd_file;
 
         /* If the device has a ROM, try to expose it in sysfs. */
         if (pci_resource_len(pdev, PCI_ROM_RESOURCE) ||
             (pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW)) {
-                rom_attr = kzalloc(sizeof(*rom_attr), GFP_ATOMIC);
-                if (rom_attr) {
-                        pdev->rom_attr = rom_attr;
-                        rom_attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
-                        rom_attr->attr.name = "rom";
-                        rom_attr->attr.mode = S_IRUSR;
-                        rom_attr->read = pci_read_rom;
-                        rom_attr->write = pci_write_rom;
-                        retval = sysfs_create_bin_file(&pdev->dev.kobj, rom_attr);
+                attr = kzalloc(sizeof(*attr), GFP_ATOMIC);
+                if (attr) {
+                        pdev->rom_attr = attr;
+                        attr->size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
+                        attr->attr.name = "rom";
+                        attr->attr.mode = S_IRUSR;
+                        attr->read = pci_read_rom;
+                        attr->write = pci_write_rom;
+                        retval = sysfs_create_bin_file(&pdev->dev.kobj, attr);
                         if (retval)
                                 goto err_rom;
                 } else {
@@ -657,12 +728,18 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
 
 err_rom_file:
         if (pci_resource_len(pdev, PCI_ROM_RESOURCE))
-                sysfs_remove_bin_file(&pdev->dev.kobj, rom_attr);
+                sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
 err_rom:
-        kfree(rom_attr);
+        kfree(pdev->rom_attr);
 err_resource_files:
         pci_remove_resource_files(pdev);
-err_bin_file:
+err_vpd_file:
+        if (pdev->vpd) {
+                sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr);
+err_vpd:
+                kfree(pdev->vpd->attr);
+        }
+err_config_file:
         if (pdev->cfg_size < 4096)
                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
         else
@@ -684,6 +761,10 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
 
         pcie_aspm_remove_sysfs_dev_files(pdev);
 
+        if (pdev->vpd) {
+                sysfs_remove_bin_file(&pdev->dev.kobj, pdev->vpd->attr);
+                kfree(pdev->vpd->attr);
+        }
         if (pdev->cfg_size < 4096)
                 sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr);
         else