mmc: mediatek: fix cannot receive new request when msdc_cmd_is_ready fail

[ Upstream commit f38a9774 ]

when msdc_cmd_is_ready return fail, the req_timeout work has not been
inited and cancel_delayed_work() will return false, then, the request
return directly and never call mmc_request_done().

so need call mod_delayed_work() before msdc_cmd_is_ready()
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/mmc/host/mtk-sd.c

@@ -1056,6 +1056,7 @@ static void msdc_start_command(struct msdc_host *host,
 	WARN_ON(host->cmd);
 	host->cmd = cmd;
 
+	mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
 	if (!msdc_cmd_is_ready(host, mrq, cmd))
 		return;
 
@@ -1067,7 +1068,6 @@ static void msdc_start_command(struct msdc_host *host,
 
 	cmd->error = 0;
 	rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
-	mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
 
 	sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
 	writel(cmd->arg, host->base + SDC_ARG);