Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 976d9276 authored by Pierre Ossman's avatar Pierre Ossman
Browse files

mmc: enforce correct sg list



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: default avatarPierre Ossman <drzeus@drzeus.cx>
parent 14d836e7
Loading
Loading
Loading
Loading
+11 −0
Original line number Diff line number Diff line
@@ -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;