This fixes:
arch/arm/mach-tegra/board-harmony-pcie.c: In function ‘harmony_pcie_init’:
arch/arm/mach-tegra/board-harmony-pcie.c:65:18: warning: ignoring return
    value of ‘regulator_enable’, declared with attribute
    warn_unused_result [-Wunused-result]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
                goto err_reg;
        }
 
-       regulator_enable(regulator);
+       err = regulator_enable(regulator);
+       if (err) {
+               pr_err("%s: regulator_enable failed: %d\n", __func__, err);
+               goto err_en;
+       }
 
        err = tegra_pcie_init(true, true);
        if (err) {
 
 err_pcie:
        regulator_disable(regulator);
+err_en:
        regulator_put(regulator);
 err_reg:
        gpio_free(en_vdd_1v05);