mmc: core: fix permanent sleep of mmcqd during card removal

This patch is derived from:
"mmc: fix async request mechanism for sequential read scenarios".

According as async transfer, a request is handled with twice mmc_start_req.
When the card is removed, the request is actually not issued in the first
mmc_start_req [__mmc_start_data_req]. And then mmc_wait_for_data_req_done
will come in the next mmc_start_req. But there is no event for completions.
wake_up_interruptible is needed in __mmc_start_data_req for the case of
removed card.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Konstantin Dorfman <kdorfman@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/core/core.c

@@ -350,6 +350,7 @@ static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq)
 	mrq->host = host;
 	if (mmc_card_removed(host->card)) {
 		mrq->cmd->error = -ENOMEDIUM;
+		mmc_wait_data_done(mrq);
 		return -ENOMEDIUM;
 	}
 	mmc_start_request(host, mrq);