diff -r a179b74831c9 -r c1f20ce4abcf kernel/eka/drivers/medmmc/medmmc.cpp
--- a/kernel/eka/drivers/medmmc/medmmc.cpp	Thu Aug 19 11:14:22 2010 +0300
+++ b/kernel/eka/drivers/medmmc/medmmc.cpp	Tue Aug 31 16:34:26 2010 +0300
@@ -1132,8 +1132,8 @@
 		iPhysStart = aStart & ~iBlkMsk;
 
 		// formats are always block-aligned, and the buffer is initialized to 0xff
-		//  Check whether erase commands are supported by this card
-		if (iCard->CSD().CCC() & KMMCCmdClassErase)
+		//  Check whether erase commands are supported by this card		
+		if ( (iCard->CSD().CCC() & KMMCCmdClassErase) && iEraseInfo.iEraseFlags) 		       
 			{
 			// Determine the erase end point for the next command. We don't erase past the preferred erase unit
 			// size. Therefore, check which is lower, the preferred erase unit size or the end of the requested range.
@@ -2726,6 +2726,9 @@
 	iMedReq = aRequest;
 	SetCurrentConsumption(aCurrent);
 
+	// Reset the card pointer just in case the stack has changed it.
+	iSession->SetCard(iCard);
+
 	TInt r = InCritical();
 	if (r == KErrNone)
 		{