cxl: replace loop with for_each_child_of_node(), remove unneeded of_node_put()

Rewrite the cxl_guest_init_afu() loop in cxl_of_probe() to use
for_each_child_of_node() rather than a hand-coded for loop.

Remove the useless of_node_put(afu_np) call after the loop, where it's
guaranteed that afu_np == NULL.

Reported-by: SF Markus Elfring <elfring@users.sourceforge.net>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/drivers/misc/cxl/of.c b/drivers/misc/cxl/of.c
index edc458395f68686f61cfbe83d648c23515b95a07..ec175ea5dfba1d6b16add78ba27f7116c08c7f30 100644 (file)
--- a/drivers/misc/cxl/of.c
+++ b/drivers/misc/cxl/of.c
@@ -460,7 +460,7 @@ int cxl_of_probe(struct platform_device *pdev)
        struct device_node *afu_np = NULL;
        struct cxl *adapter = NULL;
        int ret;
-       int slice, slice_ok;
+       int slice = 0, slice_ok = 0;
 
        pr_devel("in %s\n", __func__);
 
@@ -476,13 +476,13 @@ int cxl_of_probe(struct platform_device *pdev)
        }
 
        /* init afu */
-       slice_ok = 0;
-       for (afu_np = NULL, slice = 0; (afu_np = of_get_next_child(np, afu_np)); slice++) {
+       for_each_child_of_node(np, afu_np) {
                if ((ret = cxl_guest_init_afu(adapter, slice, afu_np)))
                        dev_err(&pdev->dev, "AFU %i failed to initialise: %i\n",
                                slice, ret);
                else
                        slice_ok++;
+               slice++;
        }
 
        if (slice_ok == 0) {
@@ -490,8 +490,6 @@ int cxl_of_probe(struct platform_device *pdev)
                adapter->slices = 0;
        }
 
-       if (afu_np)
-               of_node_put(afu_np);
        return 0;
 }