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 <kw@xxxxxxxxx>
Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
---
Changes in v2:
None.
Changes in v3:
Added Logan Gunthorpe's "Reviewed-by".
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
