[PATCH 1/3] mmc: sunxi: Check the value returned by clk_round_rate
From: Jean-Francois Moine <hidden>
Date: 2016-07-20 18:01:47
Also in:
linux-mmc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Ulf Hansson, Linus Torvalds
clk_round_rate() may return an error. Check it. Signed-off-by: Jean-Francois Moine <redacted> --- drivers/mmc/host/sunxi-mmc.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 2ee4c21..ba647b7 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c@@ -656,7 +656,8 @@ static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en) static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, struct mmc_ios *ios) { - u32 rate, oclk_dly, rval, sclk_dly; + long rate; + u32 oclk_dly, rval, sclk_dly; u32 clock = ios->clock; int ret;
@@ -666,13 +667,18 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, clock <<= 1; rate = clk_round_rate(host->clk_mmc, clock); - dev_dbg(mmc_dev(host->mmc), "setting clk to %d, rounded %d\n", + if (rate < 0) { + dev_err(mmc_dev(host->mmc), "error rounding clk to %d: %ld\n", + clock, rate); + return rate; + } + dev_dbg(mmc_dev(host->mmc), "setting clk to %d, rounded %ld\n", clock, rate); /* setting clock rate */ ret = clk_set_rate(host->clk_mmc, rate); if (ret) { - dev_err(mmc_dev(host->mmc), "error setting clk to %d: %d\n", + dev_err(mmc_dev(host->mmc), "error setting clk to %ld: %d\n", rate, ret); return ret; }
--
2.9.2