From: lintao <lintao@rock-chips.com>
Date: Wed, 8 Oct 2014 00:20:33 +0000 (+0800)
Subject: fix pio complie warning
X-Git-Tag: firefly_0821_release~4610^2~4
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=709bdba41b712815897a3d3465fdeac8ab96853b;p=firefly-linux-kernel-4.4.55.git

fix pio complie warning
---

diff --git a/drivers/mmc/host/rk_sdmmc.c b/drivers/mmc/host/rk_sdmmc.c
index 4d3cf7c67862..537ae42067bc 100755
--- a/drivers/mmc/host/rk_sdmmc.c
+++ b/drivers/mmc/host/rk_sdmmc.c
@@ -2961,7 +2961,7 @@ static void dw_mci_work_routine_card(struct work_struct *work)
 
                 /* Stop edma when rountine card triggered */
                 if(cpu_is_rk3036() || cpu_is_rk312x())
-		        if(host->dma_ops->stop)
+		        if(host->dma_ops && host->dma_ops->stop)
 		                host->dma_ops->stop(host);
 
 		while (present != slot->last_detect_state) {