---

yaml --- r: 228907 b: refs/heads/master c: 30652aa h: refs/heads/master i: 228905: a82741e 228903: 78f0576 v: v3
git-mirror · Jan 9, 2011 · 55436e6 · 55436e6
1 parent 2dc2661
commit 55436e6
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Showing 3 changed files with 10 additions and 4 deletions.
diff --git 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
@@ -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
@@ -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 */