From 55436e613b407a27097704e4054491d545df177c Mon Sep 17 00:00:00 2001
From: Olof Johansson <olof@lixom.net>
Date: Sat, 1 Jan 2011 18:37:32 -0600
Subject: [PATCH] --- yaml --- r: 228907 b: refs/heads/master c:
 30652aa36b58d57fcc1a0acce51e391bbb6edf5e h: refs/heads/master i:   228905:
 a82741e77f736b36ea6cf8add4ea6a7102d979ae   228903:
 78f0576e96c25141fb0d62dde8c499398b705c2c v: v3

---
 [refs]                          |  2 +-
 trunk/drivers/mmc/host/sdhci.c  | 10 +++++++---
 trunk/include/linux/mmc/sdhci.h |  2 ++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index 439f9667c393..d780b1e510fe 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c288b85554097a3d1271f935c48b442280b2db9e
+refs/heads/master: 30652aa36b58d57fcc1a0acce51e391bbb6edf5e
diff --git a/trunk/drivers/mmc/host/sdhci.c b/trunk/drivers/mmc/host/sdhci.c
index d5febe584b05..9e15f41f87be 100644
--- a/trunk/drivers/mmc/host/sdhci.c
+++ b/trunk/drivers/mmc/host/sdhci.c
@@ -1949,10 +1949,14 @@ int sdhci_add_host(struct sdhci_host *host)
 	 * of bytes. When doing hardware scatter/gather, each entry cannot
 	 * be larger than 64 KiB though.
 	 */
-	if (host->flags & SDHCI_USE_ADMA)
-		mmc->max_seg_size = 65536;
-	else
+	if (host->flags & SDHCI_USE_ADMA) {
+		if (host->quirks & SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC)
+			mmc->max_seg_size = 65535;
+		else
+			mmc->max_seg_size = 65536;
+	} else {
 		mmc->max_seg_size = mmc->max_req_size;
+	}
 
 	/*
 	 * Maximum block size. This varies from controller to controller and
diff --git a/trunk/include/linux/mmc/sdhci.h b/trunk/include/linux/mmc/sdhci.h
index 0d953f513d81..83bd9f76709a 100644
--- a/trunk/include/linux/mmc/sdhci.h
+++ b/trunk/include/linux/mmc/sdhci.h
@@ -83,6 +83,8 @@ struct sdhci_host {
 #define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12		(1<<28)
 /* Controller doesn't have HISPD bit field in HI-SPEED SD card */
 #define SDHCI_QUIRK_NO_HISPD_BIT			(1<<29)
+/* Controller treats ADMA descriptors with length 0000h incorrectly */
+#define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC		(1<<30)
 
 	int irq;		/* Device IRQ */
 	void __iomem *ioaddr;	/* Mapped address */