au1xmmc: abort requests early if no card is present.

Don't process an MMC request if no card is present.
Signed-off-by: NManuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

drivers/mmc/host/au1xmmc.c

@@ -697,6 +697,13 @@ static void au1xmmc_request(struct mmc_host* mmc, struct mmc_request* mrq)
 	host->mrq = mrq;
 	host->status = HOST_S_CMD;
 
+	/* fail request immediately if no card is present */
+	if (0 == au1xmmc_card_inserted(host)) {
+		mrq->cmd->error = -ENOMEDIUM;
+		au1xmmc_finish_request(host);
+		return;
+	}
+
 	if (mrq->data) {
 		FLUSH_FIFO(host);
 		ret = au1xmmc_prepare_data(host, mrq->data);