diff --git a/[refs] b/[refs]
index 8fa492504220..44f068998173 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0107a4b32e36dccd4456e2c5e34c5cd22c94e094
+refs/heads/master: c3bff2ec10b8bf2f53c954e370f9bdae93064472
diff --git a/trunk/drivers/mmc/core/sd.c b/trunk/drivers/mmc/core/sd.c
index 41bfb5dfe6ff..918477c490b0 100644
--- a/trunk/drivers/mmc/core/sd.c
+++ b/trunk/drivers/mmc/core/sd.c
@@ -427,6 +427,21 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 		mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
 	}
 
+	/*
+	 * Check if read-only switch is active.
+	 */
+	if (!oldcard) {
+		if (!host->ops->get_ro) {
+			printk(KERN_WARNING "%s: host does not "
+				"support reading read-only "
+				"switch. assuming write-enable.\n",
+				mmc_hostname(host));
+		} else {
+			if (host->ops->get_ro(host))
+				mmc_card_set_readonly(card);
+		}
+	}
+
 	if (!oldcard)
 		host->card = card;