memory: stm32-fmc2-ebi: add missing of_node_put for loop iteration

Early exits from for_each_available_child_of_node() should decrement the
node reference counter.  Reported by Coccinelle:

  drivers/memory/stm32-fmc2-ebi.c:1046:1-33: WARNING:
    Function "for_each_available_child_of_node" should have of_node_put() before return around line 1051.

Fixes: 66b8173a197f ("memory: stm32-fmc2-ebi: add STM32 FMC2 EBI controller driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Christophe Kerello <christophe.kerello@foss.st.com>
Link: https://lore.kernel.org/r/20210423101815.119341-1-krzysztof.kozlowski@canonical.com

diff --git a/drivers/memory/stm32-fmc2-ebi.c b/drivers/memory/stm32-fmc2-ebi.c
index 4d5758c..ffec26a 100644 (file)
--- a/drivers/memory/stm32-fmc2-ebi.c
+++ b/drivers/memory/stm32-fmc2-ebi.c
@@ -1048,16 +1048,19 @@ static int stm32_fmc2_ebi_parse_dt(struct stm32_fmc2_ebi *ebi)
                if (ret) {
                        dev_err(dev, "could not retrieve reg property: %d\n",
                                ret);
+                       of_node_put(child);
                        return ret;
                }
 
                if (bank >= FMC2_MAX_BANKS) {
                        dev_err(dev, "invalid reg value: %d\n", bank);
+                       of_node_put(child);
                        return -EINVAL;
                }
 
                if (ebi->bank_assigned & BIT(bank)) {
                        dev_err(dev, "bank already assigned: %d\n", bank);
+                       of_node_put(child);
                        return -EINVAL;
                }
 
@@ -1066,6 +1069,7 @@ static int stm32_fmc2_ebi_parse_dt(struct stm32_fmc2_ebi *ebi)
                        if (ret) {
                                dev_err(dev, "setup chip select %d failed: %d\n",
                                        bank, ret);
+                               of_node_put(child);
                                return ret;
                        }
                }