1 files changed, 26 insertions, 1 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 92b6d9ab00e4..91e760f9655b 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -221,12 +221,37 @@ static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR_RW(enabled);
 
 #ifdef CONFIG_NUMA
+static ssize_t numa_node_store(struct device *dev,
+                               struct device_attribute *attr, const char *buf,
+                               size_t count)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        int node, ret;
+
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+
+        ret = kstrtoint(buf, 0, &node);
+        if (ret)
+                return ret;
+
+        if (!node_online(node))
+                return -EINVAL;
+
+        add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
+        dev_alert(&pdev->dev, FW_BUG "Overriding NUMA node to %d.  Contact your vendor for updates.",
+                  node);
+
+        dev->numa_node = node;
+        return count;
+}
+
 static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
                               char *buf)
 {
         return sprintf(buf, "%d\n", dev->numa_node);
 }
-static DEVICE_ATTR_RO(numa_node);
+static DEVICE_ATTR_RW(numa_node);
 #endif
 
 static ssize_t dma_mask_bits_show(struct device *dev,