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

drivers/mmc/mmc.c

+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;