# HG changeset patch
# Parent  abf3cf6d05d6ba4cd2f2041ad70463f43404cbf0

diff -r abf3cf6d05d6 -r ad24183d4c78 sys/dev/mmc/mmcsd.c
--- a/sys/dev/mmc/mmcsd.c
+++ b/sys/dev/mmc/mmcsd.c
@@ -337,6 +337,27 @@ mmcsd_errmsg(int e)
 	return errmsg[e];
 }
 
+static void
+mmcsd_send_prewrite(struct mmcsd_softc *sc, int num_blocks)
+{
+#if 0
+	device_t dev = sc->dev;
+	device_t mmcbr = device_get_parent(dev);
+	struct mmc_command cmd;
+	struct mmc_request req;
+	
+	memset(&req, 0, sizeof(req));
+	memset(&cmd, 0, sizeof(cmd));
+
+	cmd.mrq = &req;
+	req.cmd = &cmd;
+	cmd.opcode = ACMD_SET_WR_BLK_ERASE_COUNT;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	MMCBUS_WAIT_FOR_APP_REQUEST(mmcbr, dev, &req);
+#endif
+}
+
 static daddr_t
 mmcsd_rw(struct mmcsd_softc *sc, struct bio *bp)
 {
@@ -392,6 +413,8 @@ mmcsd_rw(struct mmcsd_softc *sc, struct 
 			stop.mrq = &req;
 			req.stop = &stop;
 		}
+		if (cmd.opcode == MMC_WRITE_MULTIPLE_BLOCK)
+			mmcsd_send_prewrite(sc, numblocks);
 		MMCBUS_WAIT_FOR_REQUEST(mmcbr, dev, &req);
 		if (req.cmd->error != MMC_ERR_NONE) {
 			if (ppsratecheck(&sc->log_time, &sc->log_count, LOG_PPS)) {