i2c: mux: reg: wrong condition checked for of_address_to_resource return value

of_address_to_resource return 0 on successful call but
devm_ioremap_resource is called only if it returns non-zero value

Signed-off-by: Lukasz Gemborowski <lukasz.gemborowski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org

diff --git a/drivers/i2c/muxes/i2c-mux-reg.c b/drivers/i2c/muxes/i2c-mux-reg.c
index 26e7c51..c6a90b4 100644 (file)
--- a/drivers/i2c/muxes/i2c-mux-reg.c
+++ b/drivers/i2c/muxes/i2c-mux-reg.c
@@ -145,7 +145,7 @@ static int i2c_mux_reg_probe_dt(struct regmux *mux,
                mux->data.idle_in_use = true;
 
        /* map address from "reg" if exists */
-       if (of_address_to_resource(np, 0, &res)) {
+       if (of_address_to_resource(np, 0, &res) == 0) {
                mux->data.reg_size = resource_size(&res);
                mux->data.reg = devm_ioremap_resource(&pdev->dev, &res);
                if (IS_ERR(mux->data.reg))