[U-Boot] [PATCH v2 1/5] fastboot: sparse: remove session-id logic

[Steve Rae <srae@broadcom.com>]

This "session-id" alogrithm is not required, and currently corrupts
the stored image whenever more the one "session" is required.

Signed-off-by: Steve Rae <srae@broadcom.com>
---
for more information, see the thread starting at [1]
[1] http://lists.denx.de/pipermail/u-boot/2016-April/251889.html

Changes in v2:
- series rebased onto v2016.07-rc1

 common/fb_mmc.c                 |  8 +++-----
 common/fb_nand.c                |  4 ++--
 common/image-sparse.c           | 21 ++++-----------------
 drivers/usb/gadget/f_fastboot.c | 16 ++--------------
 include/fb_mmc.h                |  5 ++---
 include/fb_nand.h               |  5 ++---
 include/image-sparse.h          |  2 +-
 7 files changed, 16 insertions(+), 45 deletions(-)

diff --git a/common/fb_mmc.c b/common/fb_mmc.c
index e3abcc8..9e53adb 100644
--- a/common/fb_mmc.c
+++ b/common/fb_mmc.c
@@ -97,9 +97,8 @@ static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
 	fastboot_okay(response_str, "");
 }
 
-void fb_mmc_flash_write(const char *cmd, unsigned int session_id,
-			void *download_buffer, unsigned int download_bytes,
-			char *response)
+void fb_mmc_flash_write(const char *cmd, void *download_buffer,
+			unsigned int download_bytes, char *response)
 {
 	struct blk_desc *dev_desc;
 	disk_partition_t info;
@@ -153,8 +152,7 @@ void fb_mmc_flash_write(const char *cmd, unsigned int session_id,
 		printf("Flashing sparse image at offset " LBAFU "\n",
 		       info.start);
 
-		store_sparse_image(&sparse, &sparse_priv, session_id,
-				   download_buffer);
+		store_sparse_image(&sparse, &sparse_priv, download_buffer);
 	} else {
 		write_raw_image(dev_desc, &info, cmd, download_buffer,
 				download_bytes);
diff --git a/common/fb_nand.c b/common/fb_nand.c
index e55ea38..c17e2f0 100644
--- a/common/fb_nand.c
+++ b/common/fb_nand.c
@@ -126,7 +126,7 @@ static int fb_nand_sparse_write(struct sparse_storage *storage,
 	return written / storage->block_sz;
 }
 
-void fb_nand_flash_write(const char *partname, unsigned int session_id,
+void fb_nand_flash_write(const char *partname,
 			 void *download_buffer, unsigned int download_bytes,
 			 char *response)
 {
@@ -161,7 +161,7 @@ void fb_nand_flash_write(const char *partname, unsigned int session_id,
 		sparse.name = part->name;
 		sparse.write = fb_nand_sparse_write;
 
-		ret = store_sparse_image(&sparse, &sparse_priv, session_id,
+		ret = store_sparse_image(&sparse, &sparse_priv,
 					 download_buffer);
 	} else {
 		printf("Flashing raw image at offset 0x%llx\n",
diff --git a/common/image-sparse.c b/common/image-sparse.c
index 2bf737b..893c68b 100644
--- a/common/image-sparse.c
+++ b/common/image-sparse.c
@@ -52,8 +52,6 @@ typedef struct sparse_buffer {
 	u16	type;
 } sparse_buffer_t;
 
-static uint32_t last_offset;
-
 static unsigned int sparse_get_chunk_data_size(sparse_header_t *sparse,
 					       chunk_header_t *chunk)
 {
@@ -267,8 +265,8 @@ static void sparse_put_data_buffer(sparse_buffer_t *buffer)
 	free(buffer);
 }
 
-int store_sparse_image(sparse_storage_t *storage, void *storage_priv,
-		       unsigned int session_id, void *data)
+int store_sparse_image(sparse_storage_t *storage,
+		       void *storage_priv, void *data)
 {
 	unsigned int chunk, offset;
 	sparse_header_t *sparse_header;
@@ -303,19 +301,10 @@ int store_sparse_image(sparse_storage_t *storage, void *storage_priv,
 		return -EINVAL;
 	}
 
-	/*
-	 * If it's a new flashing session, start at the beginning of
-	 * the partition. If not, then simply resume where we were.
-	 */
-	if (session_id > 0)
-		start = last_offset;
-	else
-		start = storage->start;
-
-	printf("Flashing sparse image on partition %s at offset 0x%x (ID: %d)\n",
-	       storage->name, start * storage->block_sz, session_id);
+	puts("Flashing Sparse Image\n");
 
 	/* Start processing chunks */
+	start = storage->start;
 	for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
 		uint32_t blkcnt;
 
@@ -390,7 +379,5 @@ int store_sparse_image(sparse_storage_t *storage, void *storage_priv,
 		return -EIO;
 	}
 
-	last_offset = start + total_blocks;
-
 	return 0;
 }
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 28b244a..ddf989c 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -59,7 +59,6 @@ static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
 }
 
 static struct f_fastboot *fastboot_func;
-static unsigned int fastboot_flash_session_id;
 static unsigned int download_size;
 static unsigned int download_bytes;
 
@@ -424,15 +423,6 @@ static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
 
 		sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
 		strncat(response, str_num, chars_left);
-
-		/*
-		 * This also indicates the start of a new flashing
-		 * "session", in which we could have 1-N buffers to
-		 * write to a partition.
-		 *
-		 * Reset our session counter.
-		 */
-		fastboot_flash_session_id = 0;
 	} else if (!strcmp_l1("serialno", cmd)) {
 		s = getenv("serial#");
 		if (s)
@@ -600,16 +590,14 @@ static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 
 	strcpy(response, "FAILno flash device defined");
 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
-	fb_mmc_flash_write(cmd, fastboot_flash_session_id,
-			   (void *)CONFIG_FASTBOOT_BUF_ADDR,
+	fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
 			   download_bytes, response);
 #endif
 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
-	fb_nand_flash_write(cmd, fastboot_flash_session_id,
+	fb_nand_flash_write(cmd,
 			    (void *)CONFIG_FASTBOOT_BUF_ADDR,
 			    download_bytes, response);
 #endif
-	fastboot_flash_session_id++;
 	fastboot_tx_write_str(response);
 }
 #endif
diff --git a/include/fb_mmc.h b/include/fb_mmc.h
index 978a139..402ba9b 100644
--- a/include/fb_mmc.h
+++ b/include/fb_mmc.h
@@ -4,7 +4,6 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-void fb_mmc_flash_write(const char *cmd, unsigned int session_id,
-			void *download_buffer, unsigned int download_bytes,
-			char *response);
+void fb_mmc_flash_write(const char *cmd, void *download_buffer,
+			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 80ddef5..88bdf36 100644
--- a/include/fb_nand.h
+++ b/include/fb_nand.h
@@ -5,7 +5,6 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-void fb_nand_flash_write(const char *cmd, unsigned int session_id,
-			 void *download_buffer, unsigned int download_bytes,
-			 char *response);
+void fb_nand_flash_write(const char *cmd, void *download_buffer,
+			 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 0382f5b..a2b0694 100644
--- a/include/image-sparse.h
+++ b/include/image-sparse.h
@@ -32,4 +32,4 @@ static inline int is_sparse_image(void *buf)
 }
 
 int store_sparse_image(sparse_storage_t *storage, void *storage_priv,
-		       unsigned int session_id, void *data);
+		       void *data);
-- 
1.8.5