[PATCH 25/27] sunxi: suniv: disable mmc optimization for suniv

[Yifan Gu]

suniv cannot boot with this mmc optimization, as suniv fifo level
register is only 4 bits.

Disable this optimization for suniv for now.

Signed-off-by: Yifan Gu <m...@yifangu.com>
---
 drivers/mmc/sunxi_mmc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index 178b8cf106..779c10407a 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -324,7 +324,7 @@ static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv 
*priv, struct mmc *mmc,
        start = get_timer(0);
 
        for (i = 0; i < word_cnt;) {
-               unsigned int in_fifo;
+               __maybe_unused unsigned int in_fifo;
 
                while ((status = readl(&priv->reg->status)) & status_bit) {
                        if (get_timer(start) > timeout_msecs)
@@ -343,6 +343,9 @@ static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv 
*priv, struct mmc *mmc,
                        continue;
                }
 
+#ifdef CONFIG_MACH_SUNIV
+               buff[i++] = readl(&priv->reg->fifo);
+#else
                /*
                 * The status register holds the current FIFO level, so we
                 * can be sure to collect as many words from the FIFO
@@ -355,6 +358,7 @@ static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv 
*priv, struct mmc *mmc,
                     in_fifo--)
                        buff[i++] = readl_relaxed(&priv->reg->fifo);
                dmb();
+#endif
        }
 
        return 0;
-- 
2.25.1