diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c
index d47ce01d519a..5e7f99ba8ac0 100644
--- a/drivers/usb/storage/alauda.c
+++ b/drivers/usb/storage/alauda.c
@@ -949,6 +949,7 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
 	unsigned char *buffer;
 	u16 lba, max_lba;
 	unsigned int page, len, offset;
+	unsigned int num_zones;
 	unsigned int blockshift = MEDIA_INFO(us).blockshift;
 	unsigned int pageshift = MEDIA_INFO(us).pageshift;
 	unsigned int blocksize = MEDIA_INFO(us).blocksize;
@@ -973,7 +974,9 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
 	/* Figure out the initial LBA and page */
 	lba = address >> blockshift;
 	page = (address & MEDIA_INFO(us).blockmask);
-	max_lba = MEDIA_INFO(us).capacity >> (blockshift + pageshift);
+	num_zones = MEDIA_INFO(us).capacity >> (MEDIA_INFO(us).zoneshift
+		+ blockshift + pageshift);
+	max_lba = num_zones * uzonesize;
 
 	result = USB_STOR_TRANSPORT_GOOD;
 	offset = 0;
@@ -985,10 +988,6 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
 		unsigned int pages;
 		u16 pba;
 
-		result = alauda_ensure_map_for_zone(us, zone);
-		if (result != USB_STOR_TRANSPORT_GOOD)
-			break;
-
 		/* Not overflowing capacity? */
 		if (lba >= max_lba) {
 			usb_stor_dbg(us, "Error: Requested lba %u exceeds maximum %u\n",
@@ -997,6 +996,10 @@ static int alauda_read_data(struct us_data *us, unsigned long address,
 			break;
 		}
 
+		result = alauda_ensure_map_for_zone(us, zone);
+		if (result != USB_STOR_TRANSPORT_GOOD)
+			break;
+
 		/* Find number of pages we can read in this block */
 		pages = min(sectors, blocksize - page);
 		len = pages << pageshift;
@@ -1052,6 +1055,7 @@ static int alauda_write_data(struct us_data *us, unsigned long address,
 	unsigned int pagesize = MEDIA_INFO(us).pagesize;
 	struct scatterlist *sg;
 	u16 lba, max_lba;
+	unsigned int num_zones;
 	int result;
 
 	/*
@@ -1078,7 +1082,9 @@ static int alauda_write_data(struct us_data *us, unsigned long address,
 	/* Figure out the initial LBA and page */
 	lba = address >> blockshift;
 	page = (address & MEDIA_INFO(us).blockmask);
-	max_lba = MEDIA_INFO(us).capacity >> (pageshift + blockshift);
+	num_zones = MEDIA_INFO(us).capacity >> (MEDIA_INFO(us).zoneshift
+		+ blockshift + pageshift);
+	max_lba = num_zones * MEDIA_INFO(us).uzonesize;
 
 	result = USB_STOR_TRANSPORT_GOOD;
 	offset = 0;