mmc: dw_mmc: init desc in dw_mci_idmac_init

Message ID 1430403388-4184-1-git-send-email-zhangfei.gao@linaro.org
State New
Headers show

Commit Message

zhangfei April 30, 2015, 2:16 p.m.
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>
---
 drivers/mmc/host/dw_mmc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 241454f..488a8af 100644
--- 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);