From f6549c85410668e73503221ce6147d049cc6251d Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Sat, 17 Mar 2018 22:49:36 +0000 Subject: [PATCH] mmc: avoid division by zero in meson_mmc_config_clock The Odroid C2 fails to read from mmc with U-Boot v2018.03. The change avoids a division by zero. The fix was suggested by Jaehoon in https://lists.denx.de/pipermail/u-boot/2018-January/318577.html Reported-by: Vagrant Cascadian Suggested-by: Jaehoon Chung Signed-off-by: Heinrich Schuchardt Tested-by: Vagrant Cascadian --- drivers/mmc/meson_gx_mmc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/meson_gx_mmc.c b/drivers/mmc/meson_gx_mmc.c index a2cd5d3a44..454593eec4 100644 --- a/drivers/mmc/meson_gx_mmc.c +++ b/drivers/mmc/meson_gx_mmc.c @@ -35,6 +35,9 @@ static void meson_mmc_config_clock(struct mmc *mmc) uint32_t meson_mmc_clk = 0; unsigned int clk, clk_src, clk_div; + if (!mmc->clock) + return; + /* 1GHz / CLK_MAX_DIV = 15,9 MHz */ if (mmc->clock > 16000000) { clk = SD_EMMC_CLKSRC_DIV2; -- 2.25.1