diff options
| -rw-r--r-- | drivers/mmc/host/mmci.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 03495a74861..a7bf8470231 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -578,10 +578,14 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) /* * The ST Micro variant for SDIO transfer sizes - * less then 8 bytes should have clock H/W flow - * control disabled. - */ - if ((host->size < 8) && (data->flags & MMC_DATA_WRITE)) + * less then or equal to 8 bytes needs to have clock + * H/W flow control disabled. Since flow control is + * not really needed for anything that fits in the + * FIFO, we can disable it for any write smaller + * than the FIFO size. + */ + if ((host->size <= variant->fifosize) && + (data->flags & MMC_DATA_WRITE)) writel(readl(host->base + MMCICLOCK) & ~variant->clkreg_enable, host->base + MMCICLOCK); |