[PATCH 5.15 630/779] watchdog: sp5100_tco: Fix a memory leak of EFCH MMIO resource

[Greg Kroah-Hartman]

From: Jean Delvare <jdelvare@xxxxxxx>

[ Upstream commit c6d9c0798ed366a09a9e53d71edcd2266e34a6eb ]

Unlike release_mem_region(), a call to release_resource() does not
free the resource, so it has to be freed explicitly to avoid a memory
leak.

Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
Fixes: 0578fff4aae5 ("Watchdog: sp5100_tco: Add initialization using EFCH MMIO")
Cc: Terry Bowman <terry.bowman@xxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220621152840.420a0f4c@endymion.delvare
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/watchdog/sp5100_tco.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c
index 4820af929a82..4afc468d8ed1 100644
--- a/drivers/watchdog/sp5100_tco.c
+++ b/drivers/watchdog/sp5100_tco.c
@@ -394,6 +394,7 @@ static int sp5100_tco_setupdevice_mmio(struct device *dev,
 		iounmap(addr);
 
 	release_resource(res);
+	kfree(res);
 
 	return ret;
 }
-- 
2.35.1