1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 9bda3fddad17..fb04bdd26c36 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -109,6 +109,9 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
         mrq->cmd->mrq = mrq;
         if (mrq->data) {
                 BUG_ON(mrq->data->blksz > host->max_blk_size);
+                BUG_ON(mrq->data->blocks > host->max_blk_count);
+                BUG_ON(mrq->data->blocks * mrq->data->blksz >
+                        host->max_req_size);
 
                 mrq->cmd->data = mrq->data;
                 mrq->data->error = 0;
@@ -1605,10 +1608,11 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
                  */
                 host->max_hw_segs = 1;
                 host->max_phys_segs = 1;
-                host->max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
                 host->max_seg_size = PAGE_CACHE_SIZE;
 
+                host->max_req_size = PAGE_CACHE_SIZE;
                 host->max_blk_size = 512;
+                host->max_blk_count = PAGE_CACHE_SIZE / 512;
         }
 
         return host;