[MMC] Give the MMC host the full-sized request.

Pass the total number of MMC data blocks in the request to the
host driver.  Since existing MMC host drivers do not support
scatter-gather at present, the block queue defaults have been
chosen to prevent scatter-gather block requests for MMC.  A
host can alter these parameters when it wishes to take advantage
of SG capabilities.

drivers/mmc/mmc_block.c

@@ -184,7 +184,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 		brq.data.timeout_ns = card->csd.tacc_ns * 10;
 		brq.data.timeout_clks = card->csd.tacc_clks * 10;
 		brq.data.blksz_bits = md->block_bits;
-		brq.data.blocks = req->current_nr_sectors >> (md->block_bits - 9);
+		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
 		brq.stop.opcode = MMC_STOP_TRANSMISSION;
 		brq.stop.arg = 0;
 		brq.stop.flags = MMC_RSP_SHORT | MMC_RSP_CRC | MMC_RSP_BUSY;