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>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/misc/cxl/of.c b/drivers/misc/cxl/of.c
index edc458395f68..ec175ea5dfba 100644
--- 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;
 }