mmc: delete is_first_req parameter from pre-request callback

The void (*pre_req) callback in the struct mmc_host_ops vtable
is passing an argument "is_first_req" indicating whether this is
the first request or not.

None of the in-kernel users use this parameter: instead, since
they all just do variants of dma_map* they use the DMA cookie
to indicate whether a pre* callback has already been done for
a request when they decide how to handle it.

Delete the parameter from the callback and all users, as it is
just pointless cruft.

Signed-off-by: Linus Walleij <[e-mail]>
Acked-by: Jaehoon Chung <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/core/core.c

···
  *	mmc_pre_req - Prepare for a new request
  *	@host: MMC host to prepare command
  *	@mrq: MMC request to prepare for
- *	@is_first_req: true if there is no previous started request
- *                     that may run in parellel to this call, otherwise false
  *
  *	mmc_pre_req() is called in prior to mmc_start_req() to let
  *	host prepare for the new request. Preparation of a request may be
  *	performed while another request is running on the host.
  */
-static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
-		 bool is_first_req)
+static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq)
 {
 	if (host->ops->pre_req)
-		host->ops->pre_req(host, mrq, is_first_req);
+		host->ops->pre_req(host, mrq);
 }
 
 /**
···
 
 	/* Prepare a new request */
 	if (areq)
-		mmc_pre_req(host, areq->mrq, !host->areq);
+		mmc_pre_req(host, areq->mrq);
 
 	if (host->areq) {
 		status = mmc_wait_for_data_req_done(host, host->areq->mrq, areq);
···
 
 			/* prepare the request again */
 			if (areq)
-				mmc_pre_req(host, areq->mrq, !host->areq);
+				mmc_pre_req(host, areq->mrq);
 		}
 	}
 

drivers/mmc/host/dw_mmc.c

···
 }
 
 static void dw_mci_pre_req(struct mmc_host *mmc,
-			   struct mmc_request *mrq,
-			   bool is_first_req)
+			   struct mmc_request *mrq)
 {
 	struct dw_mci_slot *slot = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;

drivers/mmc/host/jz4740_mmc.c

···
 }
 
 static void jz4740_mmc_pre_request(struct mmc_host *mmc,
-				   struct mmc_request *mrq,
-				   bool is_first_req)
+				   struct mmc_request *mrq)
 {
 	struct jz4740_mmc_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;

drivers/mmc/host/mmci.c

···
 	next->dma_chan = NULL;
 }
 
-static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq,
-			     bool is_first_req)
+static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct mmci_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;

drivers/mmc/host/mtk-sd.c

···
 		msdc_start_command(host, mrq, mrq->cmd);
 }
 
-static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
-		bool is_first_req)
+static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct msdc_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;

drivers/mmc/host/omap_hsmmc.c

···
 	}
 }
 
-static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
-			       bool is_first_req)
+static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct omap_hsmmc_host *host = mmc_priv(mmc);
 

drivers/mmc/host/rtsx_pci_sdmmc.c

···
 	return using_cookie;
 }
 
-static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
-		bool is_first_req)
+static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;

drivers/mmc/host/sdhci.c

···
 	data->host_cookie = COOKIE_UNMAPPED;
 }
 
-static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
-			       bool is_first_req)
+static void sdhci_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct sdhci_host *host = mmc_priv(mmc);
 

include/linux/mmc/host.h

···
 	 */
 	void	(*post_req)(struct mmc_host *host, struct mmc_request *req,
 			    int err);
-	void	(*pre_req)(struct mmc_host *host, struct mmc_request *req,
-			   bool is_first_req);
+	void	(*pre_req)(struct mmc_host *host, struct mmc_request *req);
 	void	(*request)(struct mmc_host *host, struct mmc_request *req);
 
 	/*