pinctrl: core: Fix warning by removing bogus code

Andre Przywara <andre.przywara@arm.com> noticed that we can get the
following warning with -EPROBE_DEFER:

"WARNING: CPU: 1 PID: 89 at drivers/base/dd.c:349
driver_probe_device+0x2ac/0x2e8"

Let's fix the issue by removing the indices as suggested by
Tejun Heo <tj@kernel.org>. All we have to do here is kill the radix
tree.

I probably ended up with the indices after grepping for removal
of all entries using radix_tree_for_each_slot() and the first
match found was gmap_radix_tree_free(). Anyways, no need for
indices here, and we can just do remove all the entries using
radix_tree_for_each_slot() along how the item_kill_tree() test
case does.

Fixes: c7059c5ac70a ("pinctrl: core: Add generic pinctrl functions for managing groups")
Fixes: a76edc89b100 ("pinctrl: core: Add generic pinctrl functions for managing groups")
Reported-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 4 insertions, 17 deletions

diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index 9fd6d9087dc5..16b3ae5e4f44 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -826,30 +826,17 @@ EXPORT_SYMBOL_GPL(pinmux_generic_remove_function);
  * pinmux_generic_free_functions() - removes all functions
  * @pctldev: pin controller device
  *
- * Note that the caller must take care of locking.
+ * Note that the caller must take care of locking. The pinctrl
+ * functions are allocated with devm_kzalloc() so no need to free
+ * them here.
  */
 void pinmux_generic_free_functions(struct pinctrl_dev *pctldev)
 {
         struct radix_tree_iter iter;
-        struct function_desc *function;
-        unsigned long *indices;
         void **slot;
-        int i = 0;
-
-        indices = devm_kzalloc(pctldev->dev, sizeof(*indices) *
-                               pctldev->num_functions, GFP_KERNEL);
-        if (!indices)
-                return;
 
         radix_tree_for_each_slot(slot, &pctldev->pin_function_tree, &iter, 0)
-                indices[i++] = iter.index;
-
-        for (i = 0; i < pctldev->num_functions; i++) {
-                function = radix_tree_lookup(&pctldev->pin_function_tree,
-                                             indices[i]);
-                radix_tree_delete(&pctldev->pin_function_tree, indices[i]);
-                devm_kfree(pctldev->dev, function);
-        }
+                radix_tree_delete(&pctldev->pin_function_tree, iter.index);
 
         pctldev->num_functions = 0;
 }