[U-Boot] [bug report] sunxi: booting from eMMC

[Alexandr Bochkarev]

I have found problem place, this patch with hotfix allows to boot Allwinner A20 from eMMC.
Dont know how to full fix it.

commit 9fa5bf30e95ead17eb0c50375b305fb8615427a9
Author: root <aneox.inbox at gmail.com>
Date:   Sat Nov 5 04:41:30 2016 +0600

    allow to boot A20 from eMMC, fix

diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index 6953acc..87cf964 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -293,11 +293,17 @@ static int mmc_trans_data_by_cpu(struct mmc *mmc, struct mmc_data *data)
 }
 
 static int mmc_rint_wait(struct mmc *mmc, unsigned int timeout_msecs,
-			 unsigned int done_bit, const char *what)
+			 unsigned int done_bit, const char *what, struct mmc_cmd *cmd)
 {
 	struct sunxi_mmc_host *mmchost = mmc->priv;
 	unsigned int status;
 
+	if (cmd->cmdidx == MMC_CMD_SWITCH)
+	{
+		printf("mmc_rint_wait: fix me\n");
+		return 0;
+	}
+
 	do {
 		status = readl(&mmchost->reg->rint);
 		if (!timeout_msecs-- ||
@@ -380,7 +386,7 @@ static int sunxi_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 		}
 	}
 
-	error = mmc_rint_wait(mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE, "cmd");
+	error = mmc_rint_wait(mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE, "cmd", cmd);
 	if (error)
 		goto out;
 
@@ -391,7 +397,7 @@ static int sunxi_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 				      data->blocks > 1 ?
 				      SUNXI_MMC_RINT_AUTO_COMMAND_DONE :
 				      SUNXI_MMC_RINT_DATA_OVER,
-				      "data");
+				      "data", cmd);
 		if (error)
 			goto out;
 	}