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mmc: dw_mmc: init desc in dw_mci_idmac_init

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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 <[email protected]>
Signed-off-by: Zhangfei Gao <[email protected]>
Signed-off-by: Jaehoon Chung <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Zhangfei Gao 2015-04-30 22:16:28 +08:00 • committed by Ulf Hansson
commit 4b24472483
1 changed files with 3 additions and 1 deletions
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4
drivers/mmc/host/dw_mmc.c
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@ -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);