X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fpci%2Fpci-sysfs.c;h=a5addbc9c026a1c5c874904879641766b4eac117;hb=c75059c46293adf1560162c17148ab94624f5ed2;hp=2c6643fdc0cf27bcb9b726bb6c9febf3ca137dc7;hpb=350e4f4985472e29091b899bc227d75d2a66fb4c;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 2c6643fdc0cf..a5addbc9c026 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -221,12 +221,37 @@ static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR_RW(enable);
 
 #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,