pinctrl: k210: Fix k210_fpioa_probe()

In k210_fpioa_probe(), add missing calls to clk_disable_unprepare() in
case of error after cenabling the clk and pclk clocks. Also add missing
error handling when enabling pclk.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: d4c34d09ab ("pinctrl: Add RISC-V Canaan Kendryte K210 FPIOA driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Link: https://lore.kernel.org/r/20210806004311.52859-1-damien.lemoal@wdc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-k210.c

@@ -950,23 +950,37 @@ static int k210_fpioa_probe(struct platform_device *pdev)
 		return ret;
 
 	pdata->pclk = devm_clk_get_optional(dev, "pclk");
-	if (!IS_ERR(pdata->pclk))
-		clk_prepare_enable(pdata->pclk);
+	if (!IS_ERR(pdata->pclk)) {
+		ret = clk_prepare_enable(pdata->pclk);
+		if (ret)
+			goto disable_clk;
+	}
 
 	pdata->sysctl_map =
 		syscon_regmap_lookup_by_phandle_args(np,
 						"canaan,k210-sysctl-power",
 						1, &pdata->power_offset);
-	if (IS_ERR(pdata->sysctl_map))
-		return PTR_ERR(pdata->sysctl_map);
+	if (IS_ERR(pdata->sysctl_map)) {
+		ret = PTR_ERR(pdata->sysctl_map);
+		goto disable_pclk;
+	}
 
 	k210_fpioa_init_ties(pdata);
 
 	pdata->pctl = pinctrl_register(&k210_pinctrl_desc, dev, (void *)pdata);
-	if (IS_ERR(pdata->pctl))
-		return PTR_ERR(pdata->pctl);
+	if (IS_ERR(pdata->pctl)) {
+		ret = PTR_ERR(pdata->pctl);
+		goto disable_pclk;
+	}
 
 	return 0;
+
+disable_pclk:
+	clk_disable_unprepare(pdata->pclk);
+disable_clk:
+	clk_disable_unprepare(pdata->clk);
+
+	return ret;
 }
 
 static const struct of_device_id k210_fpioa_dt_ids[] = {