From 4ca9244d74f146a0605f5bee28a66e39aae88d3e Mon Sep 17 00:00:00 2001
From: John Rigby <john.rigby@linaro.org>
Date: Tue, 19 Apr 2011 05:48:14 +0000
Subject: [PATCH] MMC: omap_hsmmc.c: disable multiblock rw on old rev omap34xx
 silicon

Signed-off-by: John Rigby <john.rigby@linaro.org>
---
 drivers/mmc/omap_hsmmc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index dcbde8935a..957b9877a0 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -467,6 +467,14 @@ int omap_mmc_init(int dev_index)
 
 	mmc->b_max = 0;
 
+#if defined(CONFIG_OMAP34XX)
+	/*
+	 * Silicon revs 2.1 and older do not support multiblock transfers.
+	 */
+	if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21))
+		mmc->b_max = 1;
+#endif
+
 	mmc_register(mmc);
 
 	return 0;
-- 
2.39.5