mmc: renesas-sdhi: Add proper probe error fail path

In case one of the calls in probe fail, trigger a fail path and
undo all the steps done in probe until the point of failure.
The current implementation failed to stop controller clock and
free claimed clock, so fix that. Furthermore, print return code
in error prints for easier debugging.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c
index 2473261..34119f9 100644 (file)
--- a/drivers/mmc/renesas-sdhi.c
+++ b/drivers/mmc/renesas-sdhi.c
@@ -982,37 +982,45 @@ static int renesas_sdhi_probe(struct udevice *dev)
        } else {
                ret = clk_set_rate(&priv->clkh, 800000000);
                if (ret < 0) {
-                       dev_err(dev, "failed to set rate for SDnH clock\n");
-                       clk_free(&priv->clk);
-                       return ret;
+                       dev_err(dev, "failed to set rate for SDnH clock (%d)\n", ret);
+                       goto err_clk;
                }
        }
 
        /* set to max rate */
        ret = clk_set_rate(&priv->clk, 200000000);
        if (ret < 0) {
-               dev_err(dev, "failed to set rate for host clock\n");
-               clk_free(&priv->clk);
-               return ret;
+               dev_err(dev, "failed to set rate for SDn clock (%d)\n", ret);
+               goto err_clkh;
        }
 
        ret = clk_enable(&priv->clk);
        if (ret) {
-               dev_err(dev, "failed to enable host clock\n");
-               return ret;
+               dev_err(dev, "failed to enable SDn clock (%d)\n", ret);
+               goto err_clkh;
        }
 
        priv->quirks = quirks;
        ret = tmio_sd_probe(dev, quirks);
+       if (ret)
+               goto err_tmio_probe;
 
        renesas_sdhi_filter_caps(dev);
 
 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
     CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
     CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
-       if (!ret && (priv->caps & TMIO_SD_CAP_RCAR_UHS))
+       if (priv->caps & TMIO_SD_CAP_RCAR_UHS)
                renesas_sdhi_reset_tuning(priv);
 #endif
+       return 0;
+
+err_tmio_probe:
+       clk_disable(&priv->clk);
+err_clkh:
+       clk_free(&priv->clkh);
+err_clk:
+       clk_free(&priv->clk);
        return ret;
 }