From 08846698703dedae6c6915eb4b4d0a36188c5635 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Sun, 31 Aug 2008 14:10:08 +0200 Subject: [PATCH] mmc_block: hard code 512 byte block size We use 512 byte blocks on all cards, and newer cards support nothing else, so hard code it and make the code less complex. Signed-off-by: Pierre Ossman --- drivers/mmc/card/block.c | 23 +++++------------------ 1 file changed, 5 insertions(+), 18 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index d73cac84d9f..1d1e469e08e 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -57,7 +57,6 @@ struct mmc_blk_data { struct mmc_queue queue; unsigned int usage; - unsigned int block_bits; unsigned int read_only; }; @@ -231,11 +230,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) if (!mmc_card_blockaddr(card)) brq.cmd.arg <<= 9; brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; - brq.data.blksz = 1 << md->block_bits; + brq.data.blksz = 512; brq.stop.opcode = MMC_STOP_TRANSMISSION; brq.stop.arg = 0; brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; - brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); + brq.data.blocks = req->nr_sectors; if (brq.data.blocks > 1) { /* SPI multiblock writes terminate using a special @@ -351,16 +350,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) if (rq_data_dir(req) != READ) { if (mmc_card_sd(card)) { u32 blocks; - unsigned int bytes; blocks = mmc_sd_num_wr_blocks(card); if (blocks != (u32)-1) { - if (card->csd.write_partial) - bytes = blocks << md->block_bits; - else - bytes = blocks << 9; spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, bytes); + ret = __blk_end_request(req, 0, blocks << 9); spin_unlock_irq(&md->lock); } } else { @@ -410,13 +404,6 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) */ md->read_only = mmc_blk_readonly(card); - /* - * Both SD and MMC specifications state (although a bit - * unclearly in the MMC case) that a block size of 512 - * bytes must always be supported by the card. - */ - md->block_bits = 9; - md->disk = alloc_disk(1 << MMC_SHIFT); if (md->disk == NULL) { ret = -ENOMEM; @@ -454,7 +441,7 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) sprintf(md->disk->disk_name, "mmcblk%d", devidx); - blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); + blk_queue_hardsect_size(md->queue.queue, 512); if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { /* @@ -492,7 +479,7 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) mmc_claim_host(card->host); cmd.opcode = MMC_SET_BLOCKLEN; - cmd.arg = 1 << md->block_bits; + cmd.arg = 512; cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, 5); mmc_release_host(card->host); -- 2.39.5