Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia

[firefly-linux-kernel-4.4.55.git] / drivers / mmc / host / atmel-mci.c

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 03d7c7521d9712e051cd83579ef26d1938368469..9a39e0b7e583625e7fa8a3f24dab0179e3da880a 100644 (file)
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1304,7 +1304,7 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
        if (ios->clock) {
                unsigned int clock_min = ~0U;
-               u32 clkdiv;
+               int clkdiv;
 
                spin_lock_bh(&host->lock);
                if (!host->mode_reg) {
@@ -1328,7 +1328,12 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
                /* Calculate clock divider */
                if (host->caps.has_odd_clk_div) {
                        clkdiv = DIV_ROUND_UP(host->bus_hz, clock_min) - 2;
-                       if (clkdiv > 511) {
+                       if (clkdiv < 0) {
+                               dev_warn(&mmc->class_dev,
+                                        "clock %u too fast; using %lu\n",
+                                        clock_min, host->bus_hz / 2);
+                               clkdiv = 0;
+                       } else if (clkdiv > 511) {
                                dev_warn(&mmc->class_dev,
                                         "clock %u too slow; using %lu\n",
                                         clock_min, host->bus_hz / (511 + 2));