fpga: dfl: make uinit callback optional

This patch makes uinit callback of sub features optional. With
this change, people don't need to prepare any empty uinit callback.

Signed-off-by: Wu Hao <hao.wu@intel.com>
Link: https://lore.kernel.org/r/1564914022-3710-9-git-send-email-hao.wu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 87eaef6d2723f61aa6edf846619ddd869931a45a..c0512afc4ed71025d64f7178068cdd7c767d0021 100644 (file)
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -259,7 +259,8 @@ void dfl_fpga_dev_feature_uinit(struct platform_device *pdev)
 
        dfl_fpga_dev_for_each_feature(pdata, feature)
                if (feature->ops) {
-                       feature->ops->uinit(pdev, feature);
+                       if (feature->ops->uinit)
+                               feature->ops->uinit(pdev, feature);
                        feature->ops = NULL;
                }
 }