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alistair23-linux
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mmc_block: use proper sg iterators 

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
hifive-unleashed-5.1
Pierre Ossman 2008-07-29 01:23:24 +02:00
parent a84756c573
commit b41e9c7b8e
1 changed files with 11 additions and 6 deletions
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17
drivers/mmc/card/block.c
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@ -213,7 +213,8 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
struct mmc_blk_data *md = mq->data;
struct mmc_card *card = md->queue.card;
struct mmc_blk_request brq;
int ret = 1, sg_pos, data_size;
int ret = 1, data_size, i;
struct scatterlist *sg;
mmc_claim_host(card->host);
@ -267,18 +268,22 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
mmc_queue_bounce_pre(mq);
/*
* Adjust the sg list so it is the same size as the
* request.
*/
if (brq.data.blocks !=
(req->nr_sectors >> (md->block_bits - 9))) {
data_size = brq.data.blocks * brq.data.blksz;
for (sg_pos = 0; sg_pos < brq.data.sg_len; sg_pos++) {
data_size -= mq->sg[sg_pos].length;
for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) {
data_size -= sg->length;
if (data_size <= 0) {
mq->sg[sg_pos].length += data_size;
sg_pos++;
sg->length += data_size;
i++;
break;
}
}
brq.data.sg_len = sg_pos;
brq.data.sg_len = i;
}
mmc_wait_for_req(card->host, &brq.mrq);