mmc: sdhci-of-esdhc: Fix refcount leak in esdhc_signal_voltage_switch
authorMiaoqian Lin <linmq006@gmail.com>
Mon, 23 May 2022 14:42:54 +0000 (18:42 +0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 17 Aug 2022 12:23:50 +0000 (14:23 +0200)
[ Upstream commit b5899a3e2f783a27b268e38d37f9b24c71bddf45 ]

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.
of_node_put() checks null pointer.

Fixes: ea35645a3c66 ("mmc: sdhci-of-esdhc: add support for signal voltage switch")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220523144255.10310-1-linmq006@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/mmc/host/sdhci-of-esdhc.c

index 0f3658b36513c681ae2e2bf8d71c551fbe38bc9e..04a37fd137ee1c575edf3ac7d01d0d3cd81e8eaf 100644 (file)
@@ -904,6 +904,7 @@ static int esdhc_signal_voltage_switch(struct mmc_host *mmc,
                scfg_node = of_find_matching_node(NULL, scfg_device_ids);
                if (scfg_node)
                        scfg_base = of_iomap(scfg_node, 0);
+               of_node_put(scfg_node);
                if (scfg_base) {
                        sdhciovselcr = SDHCIOVSELCR_TGLEN |
                                       SDHCIOVSELCR_VSELVAL;