4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: x00270170 xiaqing17@hisilicon.com
commit 7a6b9f4d601dfce8cb68f0dcfd834270280e31e6 upstream.
Card write threshold control is supposed to be set since controller version 2.80a for data write in HS400 mode and data read in HS200/HS400/SDR104 mode. However the current code returns without configuring it in the case of data writing in HS400 mode. Meanwhile the patch fixes that the current code goes to 'disable' when doing data reading in HS400 mode.
Fixes: 7e4bf1bc9543 ("mmc: dw_mmc: add the card write threshold for HS400 mode") Signed-off-by: Qing Xia xiaqing17@hisilicon.com Cc: stable@vger.kernel.org # v4.8+ Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/dw_mmc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -981,8 +981,8 @@ static void dw_mci_ctrl_thld(struct dw_m * It's used when HS400 mode is enabled. */ if (data->flags & MMC_DATA_WRITE && - !(host->timing != MMC_TIMING_MMC_HS400)) - return; + host->timing != MMC_TIMING_MMC_HS400) + goto disable;
if (data->flags & MMC_DATA_WRITE) enable = SDMMC_CARD_WR_THR_EN; @@ -990,7 +990,8 @@ static void dw_mci_ctrl_thld(struct dw_m enable = SDMMC_CARD_RD_THR_EN;
if (host->timing != MMC_TIMING_MMC_HS200 && - host->timing != MMC_TIMING_UHS_SDR104) + host->timing != MMC_TIMING_UHS_SDR104 && + host->timing != MMC_TIMING_MMC_HS400) goto disable;
blksz_depth = blksz / (1 << host->data_shift);