vfio: use match_string() helper

match_string() returns the index of an array for a matching string,
which can be used intead of open coded variant.

Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 721f97f..6483387 100644 (file)
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -630,8 +630,6 @@ static const char * const vfio_driver_whitelist[] = { "pci-stub" };
 
 static bool vfio_dev_whitelisted(struct device *dev, struct device_driver *drv)
 {
-       int i;
-
        if (dev_is_pci(dev)) {
                struct pci_dev *pdev = to_pci_dev(dev);
 
@@ -639,12 +637,9 @@ static bool vfio_dev_whitelisted(struct device *dev, struct device_driver *drv)
                        return true;
        }
 
-       for (i = 0; i < ARRAY_SIZE(vfio_driver_whitelist); i++) {
-               if (!strcmp(drv->name, vfio_driver_whitelist[i]))
-                       return true;
-       }
-
-       return false;
+       return match_string(vfio_driver_whitelist,
+                           ARRAY_SIZE(vfio_driver_whitelist),
+                           drv->name) >= 0;
 }
 
 /*