[PATCH v2 14/14] PCI/sysfs: Only show value when driver_override is not NULL

[Krzysztof Wilczyński]

Only expose the value of the "driver_override" variable through the
corresponding sysfs object when a value is actually set.

Signed-off-by: Krzysztof Wilczyński <k...@linux.com>
---
 drivers/pci/pci-sysfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 5d63df7c1820..4e9f582ca10f 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -580,10 +580,11 @@ static ssize_t driver_override_show(struct device *dev,
                                    struct device_attribute *attr, char *buf)
 {
        struct pci_dev *pdev = to_pci_dev(dev);
-       ssize_t len;
+       ssize_t len = 0;
 
        device_lock(dev);
-       len = sysfs_emit(buf, "%s\n", pdev->driver_override);
+       if (pdev->driver_override)
+               len = sysfs_emit(buf, "%s\n", pdev->driver_override);
        device_unlock(dev);
        return len;
 }
-- 
2.31.1