mmc: dw_mmc: init desc in dw_mci_idmac_init

Set 0 to des1 in 32bit case.
Otherwise the random value of des1 will be used in
dw_mci_translate_sglist: IDMAC_SET_BUFFER1_SIZE(desc, length)

Signed-off-by: Fei Wang <w.f@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 38b2926..69952b2 100644 (file)
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -589,9 +589,11 @@ static int dw_mci_idmac_init(struct dw_mci *host)
                host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc);
 
                /* Forward link the descriptor list */
-               for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++)
+               for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) {
                        p->des3 = cpu_to_le32(host->sg_dma +
                                        (sizeof(struct idmac_desc) * (i + 1)));
+                       p->des1 = 0;
+               }
 
                /* Set the last descriptor as the end-of-ring descriptor */
                p->des3 = cpu_to_le32(host->sg_dma);