diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index cf5b77c..02864aa 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -74,7 +74,7 @@ static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
 
 static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
 		const char *part_name, void *buffer,
-		unsigned int download_bytes)
+		unsigned int download_bytes, char *response)
 {
 	lbaint_t blkcnt;
 	lbaint_t blks;
@@ -85,7 +85,7 @@ static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
 
 	if (blkcnt > info->size) {
 		pr_err("too large for partition: '%s'\n", part_name);
-		fastboot_fail("too large for partition");
+		fastboot_fail("too large for partition", response);
 		return;
 	}
 
@@ -94,13 +94,13 @@ static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
 	blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer);
 	if (blks != blkcnt) {
 		pr_err("failed writing to device %d\n", dev_desc->devnum);
-		fastboot_fail("failed writing to device");
+		fastboot_fail("failed writing to device", response);
 		return;
 	}
 
 	printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
 	       part_name);
-	fastboot_okay("");
+	fastboot_okay("", response);
 }
 
 #ifdef CONFIG_ANDROID_BOOT_IMAGE
@@ -115,7 +115,8 @@ static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
  */
 static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
 				       disk_partition_t *info,
-				       struct andr_img_hdr *hdr)
+				       struct andr_img_hdr *hdr,
+				       char *response)
 {
 	ulong sector_size;		/* boot partition sector size */
 	lbaint_t hdr_sectors;		/* boot image header sectors count */
@@ -126,7 +127,7 @@ static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
 	hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_img_hdr), sector_size);
 	if (hdr_sectors == 0) {
 		pr_err("invalid number of boot sectors: 0");
-		fastboot_fail("invalid number of boot sectors: 0");
+		fastboot_fail("invalid number of boot sectors: 0", response);
 		return 0;
 	}
 
@@ -134,7 +135,8 @@ static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
 	res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr);
 	if (res != hdr_sectors) {
 		pr_err("cannot read header from boot partition");
-		fastboot_fail("cannot read header from boot partition");
+		fastboot_fail("cannot read header from boot partition",
+			      response);
 		return 0;
 	}
 
@@ -142,7 +144,7 @@ static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
 	res = android_image_check_header(hdr);
 	if (res != 0) {
 		pr_err("bad boot image magic");
-		fastboot_fail("boot partition not initialized");
+		fastboot_fail("boot partition not initialized", response);
 		return 0;
 	}
 
@@ -160,7 +162,8 @@ static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
  */
 static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 				void *download_buffer,
-				unsigned int download_bytes)
+				unsigned int download_bytes,
+				char *response)
 {
 	uintptr_t hdr_addr;			/* boot image header address */
 	struct andr_img_hdr *hdr;		/* boot image header */
@@ -180,7 +183,7 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 	res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info);
 	if (res < 0) {
 		pr_err("cannot find boot partition");
-		fastboot_fail("cannot find boot partition");
+		fastboot_fail("cannot find boot partition", response);
 		return -1;
 	}
 
@@ -189,17 +192,18 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 	hdr = (struct andr_img_hdr *)hdr_addr;
 
 	/* Read boot image header */
-	hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr);
+	hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response);
 	if (hdr_sectors == 0) {
 		pr_err("unable to read boot image header");
-		fastboot_fail("unable to read boot image header");
+		fastboot_fail("unable to read boot image header", response);
 		return -1;
 	}
 
 	/* Check if boot image has second stage in it (we don't support it) */
 	if (hdr->second_size > 0) {
 		pr_err("moving second stage is not supported yet");
-		fastboot_fail("moving second stage is not supported yet");
+		fastboot_fail("moving second stage is not supported yet",
+			      response);
 		return -1;
 	}
 
@@ -217,7 +221,8 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 			ramdisk_buffer);
 	if (res != ramdisk_sectors) {
 		pr_err("cannot read ramdisk from boot partition");
-		fastboot_fail("cannot read ramdisk from boot partition");
+		fastboot_fail("cannot read ramdisk from boot partition",
+			      response);
 		return -1;
 	}
 
@@ -226,7 +231,7 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 	res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr);
 	if (res == 0) {
 		pr_err("cannot writeback boot image header");
-		fastboot_fail("cannot write back boot image header");
+		fastboot_fail("cannot write back boot image header", response);
 		return -1;
 	}
 
@@ -238,7 +243,7 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 			 download_buffer);
 	if (res == 0) {
 		pr_err("cannot write new kernel");
-		fastboot_fail("cannot write new kernel");
+		fastboot_fail("cannot write new kernel", response);
 		return -1;
 	}
 
@@ -250,18 +255,18 @@ static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
 			 ramdisk_buffer);
 	if (res == 0) {
 		pr_err("cannot write back original ramdisk");
-		fastboot_fail("cannot write back original ramdisk");
+		fastboot_fail("cannot write back original ramdisk", response);
 		return -1;
 	}
 
 	puts("........ zImage was updated in boot partition\n");
-	fastboot_okay("");
+	fastboot_okay("", response);
 	return 0;
 }
 #endif
 
 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
-			unsigned int download_bytes)
+			unsigned int download_bytes, char *response)
 {
 	struct blk_desc *dev_desc;
 	disk_partition_t info;
@@ -269,7 +274,7 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
 	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
 		pr_err("invalid mmc device\n");
-		fastboot_fail("invalid mmc device");
+		fastboot_fail("invalid mmc device", response);
 		return;
 	}
 
@@ -280,16 +285,17 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
 		if (is_valid_gpt_buf(dev_desc, download_buffer)) {
 			printf("%s: invalid GPT - refusing to write to flash\n",
 			       __func__);
-			fastboot_fail("invalid GPT partition");
+			fastboot_fail("invalid GPT partition", response);
 			return;
 		}
 		if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
 			printf("%s: writing GPT partitions failed\n", __func__);
-			fastboot_fail("writing GPT partitions failed");
+			fastboot_fail("writing GPT partitions failed",
+				      response);
 			return;
 		}
 		printf("........ success\n");
-		fastboot_okay("");
+		fastboot_okay("", response);
 		return;
 	}
 #endif
@@ -300,30 +306,32 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
 		if (is_valid_dos_buf(download_buffer)) {
 			printf("%s: invalid MBR - refusing to write to flash\n",
 			       __func__);
-			fastboot_fail("invalid MBR partition");
+			fastboot_fail("invalid MBR partition", response);
 			return;
 		}
 		if (write_mbr_partition(dev_desc, download_buffer)) {
 			printf("%s: writing MBR partition failed\n", __func__);
-			fastboot_fail("writing MBR partition failed");
+			fastboot_fail("writing MBR partition failed",
+				      response);
 			return;
 		}
 		printf("........ success\n");
-		fastboot_okay("");
+		fastboot_okay("", response);
 		return;
 	}
 #endif
 
 #ifdef CONFIG_ANDROID_BOOT_IMAGE
 	if (strncasecmp(cmd, "zimage", 6) == 0) {
-		fb_mmc_update_zimage(dev_desc, download_buffer, download_bytes);
+		fb_mmc_update_zimage(dev_desc, download_buffer,
+				     download_bytes, response);
 		return;
 	}
 #endif
 
 	if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
 		pr_err("cannot find partition: '%s'\n", cmd);
-		fastboot_fail("cannot find partition");
+		fastboot_fail("cannot find partition", response);
 		return;
 	}
 
@@ -344,14 +352,14 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer,
 
 		sparse.priv = &sparse_priv;
 		write_sparse_image(&sparse, cmd, download_buffer,
-				   download_bytes);
+				   download_bytes, response);
 	} else {
 		write_raw_image(dev_desc, &info, cmd, download_buffer,
-				download_bytes);
+				download_bytes, response);
 	}
 }
 
-void fb_mmc_erase(const char *cmd)
+void fb_mmc_erase(const char *cmd, char *response)
 {
 	int ret;
 	struct blk_desc *dev_desc;
@@ -361,21 +369,21 @@ void fb_mmc_erase(const char *cmd)
 
 	if (mmc == NULL) {
 		pr_err("invalid mmc device");
-		fastboot_fail("invalid mmc device");
+		fastboot_fail("invalid mmc device", response);
 		return;
 	}
 
 	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
 		pr_err("invalid mmc device");
-		fastboot_fail("invalid mmc device");
+		fastboot_fail("invalid mmc device", response);
 		return;
 	}
 
 	ret = part_get_info_by_name_or_alias(dev_desc, cmd, &info);
 	if (ret < 0) {
 		pr_err("cannot find partition: '%s'", cmd);
-		fastboot_fail("cannot find partition");
+		fastboot_fail("cannot find partition", response);
 		return;
 	}
 
@@ -394,11 +402,11 @@ void fb_mmc_erase(const char *cmd)
 	blks = blk_derase(dev_desc, blks_start, blks_size);
 	if (blks != blks_size) {
 		pr_err("failed erasing from device %d", dev_desc->devnum);
-		fastboot_fail("failed erasing from device");
+		fastboot_fail("failed erasing from device", response);
 		return;
 	}
 
 	printf("........ erased " LBAFU " bytes from '%s'\n",
 	       blks_size * info.blksz, cmd);
-	fastboot_okay("");
+	fastboot_okay("", response);
 }
diff --git a/common/fb_nand.c b/common/fb_nand.c
index aa28046..3a0b101 100644
--- a/common/fb_nand.c
+++ b/common/fb_nand.c
@@ -32,7 +32,8 @@ __weak int board_fastboot_write_partition_setup(char *name)
 
 static int fb_nand_lookup(const char *partname,
 			  struct mtd_info **mtd,
-			  struct part_info **part)
+			  struct part_info **part,
+			  char *response)
 {
 	struct mtd_device *dev;
 	int ret;
@@ -41,21 +42,21 @@ static int fb_nand_lookup(const char *partname,
 	ret = mtdparts_init();
 	if (ret) {
 		pr_err("Cannot initialize MTD partitions\n");
-		fastboot_fail("cannot init mtdparts");
+		fastboot_fail("cannot init mtdparts", response);
 		return ret;
 	}
 
 	ret = find_dev_and_part(partname, &dev, &pnum, part);
 	if (ret) {
 		pr_err("cannot find partition: '%s'", partname);
-		fastboot_fail("cannot find partition");
+		fastboot_fail("cannot find partition", response);
 		return ret;
 	}
 
 	if (dev->id->type != MTD_DEV_TYPE_NAND) {
 		pr_err("partition '%s' is not stored on a NAND device",
 		      partname);
-		fastboot_fail("not a NAND device");
+		fastboot_fail("not a NAND device", response);
 		return -EINVAL;
 	}
 
@@ -146,16 +147,16 @@ static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info,
 }
 
 void fb_nand_flash_write(const char *cmd, void *download_buffer,
-			 unsigned int download_bytes)
+			 unsigned int download_bytes, char *response)
 {
 	struct part_info *part;
 	struct mtd_info *mtd = NULL;
 	int ret;
 
-	ret = fb_nand_lookup(cmd, &mtd, &part);
+	ret = fb_nand_lookup(cmd, &mtd, &part, response);
 	if (ret) {
 		pr_err("invalid NAND device");
-		fastboot_fail("invalid NAND device");
+		fastboot_fail("invalid NAND device", response);
 		return;
 	}
 
@@ -181,7 +182,7 @@ void fb_nand_flash_write(const char *cmd, void *download_buffer,
 
 		sparse.priv = &sparse_priv;
 		write_sparse_image(&sparse, cmd, download_buffer,
-				   download_bytes);
+				   download_bytes, response);
 	} else {
 		printf("Flashing raw image at offset 0x%llx\n",
 		       part->offset);
@@ -194,23 +195,23 @@ void fb_nand_flash_write(const char *cmd, void *download_buffer,
 	}
 
 	if (ret) {
-		fastboot_fail("error writing the image");
+		fastboot_fail("error writing the image", response);
 		return;
 	}
 
-	fastboot_okay("");
+	fastboot_okay("", response);
 }
 
-void fb_nand_erase(const char *cmd)
+void fb_nand_erase(const char *cmd, char *response)
 {
 	struct part_info *part;
 	struct mtd_info *mtd = NULL;
 	int ret;
 
-	ret = fb_nand_lookup(cmd, &mtd, &part);
+	ret = fb_nand_lookup(cmd, &mtd, &part, response);
 	if (ret) {
 		pr_err("invalid NAND device");
-		fastboot_fail("invalid NAND device");
+		fastboot_fail("invalid NAND device", response);
 		return;
 	}
 
@@ -221,9 +222,9 @@ void fb_nand_erase(const char *cmd)
 	ret = _fb_nand_erase(mtd, part);
 	if (ret) {
 		pr_err("failed erasing from device %s", mtd->name);
-		fastboot_fail("failed erasing from device");
+		fastboot_fail("failed erasing from device", response);
 		return;
 	}
 
-	fastboot_okay("");
+	fastboot_okay("", response);
 }
diff --git a/common/image-sparse.c b/common/image-sparse.c
index ddf5772..616c2bd 100644
--- a/common/image-sparse.c
+++ b/common/image-sparse.c
@@ -51,7 +51,7 @@
 
 void write_sparse_image(
 		struct sparse_storage *info, const char *part_name,
-		void *data, unsigned sz)
+		void *data, unsigned int sz, char *response)
 {
 	lbaint_t blk;
 	lbaint_t blkcnt;
@@ -101,7 +101,7 @@ void write_sparse_image(
 	if (offset) {
 		printf("%s: Sparse image block size issue [%u]\n",
 		       __func__, sparse_header->blk_sz);
-		fastboot_fail("sparse image block size issue");
+		fastboot_fail("sparse image block size issue", response);
 		return;
 	}
 
@@ -136,8 +136,8 @@ void write_sparse_image(
 		case CHUNK_TYPE_RAW:
 			if (chunk_header->total_sz !=
 			    (sparse_header->chunk_hdr_sz + chunk_data_sz)) {
-				fastboot_fail(
-					"Bogus chunk size for chunk type Raw");
+				fastboot_fail("Bogus chunk size for chunk type Raw",
+					      response);
 				return;
 			}
 
@@ -145,8 +145,8 @@ void write_sparse_image(
 				printf(
 				    "%s: Request would exceed partition size!\n",
 				    __func__);
-				fastboot_fail(
-				    "Request would exceed partition size!");
+				fastboot_fail("Request would exceed partition size!",
+					      response);
 				return;
 			}
 
@@ -156,8 +156,7 @@ void write_sparse_image(
 				printf("%s: %s" LBAFU " [" LBAFU "]\n",
 				       __func__, "Write failed, block #",
 				       blk, blks);
-				fastboot_fail(
-					      "flash write failure");
+				fastboot_fail("flash write failure", response);
 				return;
 			}
 			blk += blks;
@@ -169,8 +168,8 @@ void write_sparse_image(
 		case CHUNK_TYPE_FILL:
 			if (chunk_header->total_sz !=
 			    (sparse_header->chunk_hdr_sz + sizeof(uint32_t))) {
-				fastboot_fail(
-					"Bogus chunk size for chunk type FILL");
+				fastboot_fail("Bogus chunk size for chunk type FILL",
+					      response);
 				return;
 			}
 
@@ -180,8 +179,8 @@ void write_sparse_image(
 						info->blksz * fill_buf_num_blks,
 						ARCH_DMA_MINALIGN));
 			if (!fill_buf) {
-				fastboot_fail(
-					"Malloc failed for: CHUNK_TYPE_FILL");
+				fastboot_fail("Malloc failed for: CHUNK_TYPE_FILL",
+					      response);
 				return;
 			}
 
@@ -198,8 +197,8 @@ void write_sparse_image(
 				printf(
 				    "%s: Request would exceed partition size!\n",
 				    __func__);
-				fastboot_fail(
-				    "Request would exceed partition size!");
+				fastboot_fail("Request would exceed partition size!",
+					      response);
 				return;
 			}
 
@@ -214,8 +213,8 @@ void write_sparse_image(
 					       __func__,
 					       "Write failed, block #",
 					       blk, j);
-					fastboot_fail(
-						      "flash write failure");
+					fastboot_fail("flash write failure",
+						      response);
 					free(fill_buf);
 					return;
 				}
@@ -235,8 +234,8 @@ void write_sparse_image(
 		case CHUNK_TYPE_CRC32:
 			if (chunk_header->total_sz !=
 			    sparse_header->chunk_hdr_sz) {
-				fastboot_fail(
-					"Bogus chunk size for chunk type Dont Care");
+				fastboot_fail("Bogus chunk size for chunk type Dont Care",
+					      response);
 				return;
 			}
 			total_blocks += chunk_header->chunk_sz;
@@ -246,7 +245,7 @@ void write_sparse_image(
 		default:
 			printf("%s: Unknown chunk type: %x\n", __func__,
 			       chunk_header->chunk_type);
-			fastboot_fail("Unknown chunk type");
+			fastboot_fail("Unknown chunk type", response);
 			return;
 		}
 	}
@@ -256,9 +255,9 @@ void write_sparse_image(
 	printf("........ wrote %u bytes to '%s'\n", bytes_written, part_name);
 
 	if (total_blocks != sparse_header->total_blks)
-		fastboot_fail("sparse image write failure");
+		fastboot_fail("sparse image write failure", response);
 	else
-		fastboot_okay("");
+		fastboot_okay("", response);
 
 	return;
 }
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 7acffb6..6ae1d97 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -151,18 +151,16 @@ static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 static int strcmp_l1(const char *s1, const char *s2);
 
 
-static char *fb_response_str;
-
-void fastboot_fail(const char *reason)
+void fastboot_fail(const char *reason, char *response)
 {
-	strncpy(fb_response_str, "FAIL\0", 5);
-	strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
+	strncpy(response, "FAIL\0", 5);
+	strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 }
 
-void fastboot_okay(const char *reason)
+void fastboot_okay(const char *reason, char *response)
 {
-	strncpy(fb_response_str, "OKAY\0", 5);
-	strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
+	strncpy(response, "OKAY\0", 5);
+	strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 }
 
 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
@@ -598,18 +596,14 @@ static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 		return;
 	}
 
-	/* initialize the response buffer */
-	fb_response_str = response;
-
-	fastboot_fail("no flash device defined");
+	fastboot_fail("no flash device defined", response);
 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 	fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
-			   download_bytes);
+			   download_bytes, response);
 #endif
 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
-	fb_nand_flash_write(cmd,
-			    (void *)CONFIG_FASTBOOT_BUF_ADDR,
-			    download_bytes);
+	fb_nand_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
+			    download_bytes, response);
 #endif
 	fastboot_tx_write_str(response);
 }
@@ -650,15 +644,12 @@ static void cb_erase(struct usb_ep *ep, struct usb_request *req)
 		return;
 	}
 
-	/* initialize the response buffer */
-	fb_response_str = response;
-
-	fastboot_fail("no flash device defined");
+	fastboot_fail("no flash device defined", response);
 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
-	fb_mmc_erase(cmd);
+	fb_mmc_erase(cmd, response);
 #endif
 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
-	fb_nand_erase(cmd);
+	fb_nand_erase(cmd, response);
 #endif
 	fastboot_tx_write_str(response);
 }
diff --git a/include/fastboot.h b/include/fastboot.h
index 616631e..f22080a 100644
--- a/include/fastboot.h
+++ b/include/fastboot.h
@@ -16,7 +16,7 @@
 /* The 64 defined bytes plus \0 */
 #define FASTBOOT_RESPONSE_LEN	(64 + 1)
 
-void fastboot_fail(const char *reason);
-void fastboot_okay(const char *reason);
+void fastboot_fail(const char *reason, char *response);
+void fastboot_okay(const char *reason, char *response);
 
 #endif /* _FASTBOOT_H_ */
diff --git a/include/fb_mmc.h b/include/fb_mmc.h
index 12b99cb..402ba9b 100644
--- a/include/fb_mmc.h
+++ b/include/fb_mmc.h
@@ -5,5 +5,5 @@
  */
 
 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
-			unsigned int download_bytes);
-void fb_mmc_erase(const char *cmd);
+			unsigned int download_bytes, char *response);
+void fb_mmc_erase(const char *cmd, char *response);
diff --git a/include/fb_nand.h b/include/fb_nand.h
index aaf7cf7..88bdf36 100644
--- a/include/fb_nand.h
+++ b/include/fb_nand.h
@@ -6,5 +6,5 @@
  */
 
 void fb_nand_flash_write(const char *cmd, void *download_buffer,
-			 unsigned int download_bytes);
-void fb_nand_erase(const char *cmd);
+			 unsigned int download_bytes, char *response);
+void fb_nand_erase(const char *cmd, char *response);
diff --git a/include/image-sparse.h b/include/image-sparse.h
index b0cc500..02453c8 100644
--- a/include/image-sparse.h
+++ b/include/image-sparse.h
@@ -37,4 +37,4 @@ static inline int is_sparse_image(void *buf)
 }
 
 void write_sparse_image(struct sparse_storage *info, const char *part_name,
-			void *data, unsigned sz);
+			void *data, unsigned int sz, char *response);
