mmc: sh_mobile_sdhi: check return value when changing clk
And return the old clock rate if something went wrong.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index ac9ba36..5309c73b 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -166,7 +166,7 @@
{
struct sh_mobile_sdhi *priv = host_to_priv(host);
unsigned int freq, diff, best_freq = 0, diff_min = ~0;
- int i;
+ int i, ret;
/* tested only on RCar Gen2+ currently; may work for others */
if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
@@ -195,9 +195,9 @@
}
}
- clk_set_rate(priv->clk, best_freq);
+ ret = clk_set_rate(priv->clk, best_freq);
- return best_freq;
+ return ret == 0 ? best_freq : clk_get_rate(priv->clk);
}
static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)