rk29_sdmmc: fix hotplug problem

diff --git a/drivers/mmc/host/rk29_sdmmc.c b/drivers/mmc/host/rk29_sdmmc.c
index 627a15d0668f2d8450afd6943a3311615b31d060..6f4c3bf083c12319c422417493dfee5456248859 100755 (executable)
--- a/drivers/mmc/host/rk29_sdmmc.c
+++ b/drivers/mmc/host/rk29_sdmmc.c
@@ -46,7 +46,7 @@
 #define RK29_SDMMC_ERROR_FLAGS         (RK29_SDMMC_DATA_ERROR_FLAGS | RK29_SDMMC_CMD_ERROR_FLAGS | SDMMC_INT_HLE)
 #define RK29_SDMMC_SEND_STATUS         1
 #define RK29_SDMMC_RECV_STATUS         2
-#define RK29_SDMMC_DMA_THRESHOLD       16
+#define RK29_SDMMC_DMA_THRESHOLD       512
 
 enum {
        EVENT_CMD_COMPLETE = 0,
@@ -455,10 +455,9 @@ static int rk29_sdmmc_submit_data_dma(struct rk29_sdmmc *host, struct mmc_data *
         * non-word-aligned buffers or lengths. Also, we don't bother
         * with all the DMA setup overhead for short transfers.
         */
-#if 0
        if (data->blocks * data->blksz < RK29_SDMMC_DMA_THRESHOLD)
                return -EINVAL;
-#endif
+
        if (data->blksz & 3)
                return -EINVAL;
        for_each_sg(data->sg, sg, data->sg_len, i) {