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mmc: enforce correct sg list

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Now that we've fixed our only offender when it comes to strange sg
list, add a check so that future users keep the sg list proper with
regard to transfer size.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2007-04-13 22:47:01 +02:00
parent 14d836e749
commit 976d9276c8
1 changed files with 11 additions and 0 deletions
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11
drivers/mmc/mmc.c
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@ -99,6 +99,10 @@ EXPORT_SYMBOL(mmc_request_done);
void
mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
#ifdef CONFIG_MMC_DEBUG
unsigned int i, sz;
#endif
pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
mmc_hostname(host), mrq->cmd->opcode,
mrq->cmd->arg, mrq->cmd->flags);
@ -113,6 +117,13 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
BUG_ON(mrq->data->blocks * mrq->data->blksz >
host->max_req_size);
#ifdef CONFIG_MMC_DEBUG
sz = 0;
for (i = 0;i < mrq->data->sg_len;i++)
sz += mrq->data->sg[i].length;
BUG_ON(sz != mrq->data->blocks * mrq->data->blksz);
#endif
mrq->cmd->data = mrq->data;
mrq->data->error = 0;
mrq->data->mrq = mrq;