From f3f44d512cafef7e3d2cb140f642786dd6ec8818 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 2 May 2016 22:25:42 +0200 Subject: [PATCH] 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 Tested-by: Geert Uytterhoeven Signed-off-by: Ulf Hansson --- drivers/mmc/host/sh_mobile_sdhi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c index ac9ba36da39b..5309c73be1f0 100644 --- a/drivers/mmc/host/sh_mobile_sdhi.c +++ b/drivers/mmc/host/sh_mobile_sdhi.c @@ -166,7 +166,7 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host, { 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 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host, } } - 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) -- GitLab