[PATCH v6 3/7] bloblist: refactor of bloblist_reloc()

[Raymond Mao]

The current bloblist pointer and size can be retrieved from global
data, so we don't need to pass them from the function arguments.
This change also help to remove all external access of gd->bloblist
outside of bloblist module.

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
Changes in v2
- New patch file created for v2.
Changes in v3
- Check the space size before copying the bloblist.
- Add return code of bloblist_reloc().
Changes in v4
- return error code from bloblist_reloc().

 common/bloblist.c  | 10 ++++++++--
 common/board_f.c   |  9 +++------
 include/bloblist.h |  8 ++++----
 test/bloblist.c    |  6 ++----
 4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/common/bloblist.c b/common/bloblist.c
index 26b0ba33b1..c2fd07575f 100644
--- a/common/bloblist.c
+++ b/common/bloblist.c
@@ -472,13 +472,19 @@ void bloblist_show_list(void)
 	}
 }
 
-void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
+int bloblist_reloc(void *to, uint to_size)
 {
 	struct bloblist_hdr *hdr;
 
-	memcpy(to, from, from_size);
+	if (to_size < gd->bloblist->total_size)
+		return -ENOSPC;
+
+	memcpy(to, gd->bloblist, gd->bloblist->total_size);
 	hdr = to;
 	hdr->total_size = to_size;
+	gd->bloblist = to;
+
+	return 0;
 }
 
 int bloblist_init(void)
diff --git a/common/board_f.c b/common/board_f.c
index d4d7d01f8f..f4145a2698 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -676,13 +676,10 @@ static int reloc_bloblist(void)
 		return 0;
 	}
 	if (gd->new_bloblist) {
-		int size = CONFIG_BLOBLIST_SIZE;
-
 		debug("Copying bloblist from %p to %p, size %x\n",
-		      gd->bloblist, gd->new_bloblist, size);
-		bloblist_reloc(gd->new_bloblist, CONFIG_BLOBLIST_SIZE_RELOC,
-			       gd->bloblist, size);
-		gd->bloblist = gd->new_bloblist;
+		      gd->bloblist, gd->new_bloblist, gd->bloblist->total_size);
+		return bloblist_reloc(gd->new_bloblist,
+				      CONFIG_BLOBLIST_SIZE_RELOC);
 	}
 #endif
 
diff --git a/include/bloblist.h b/include/bloblist.h
index cc78259e5a..0ae079d62a 100644
--- a/include/bloblist.h
+++ b/include/bloblist.h
@@ -426,11 +426,11 @@ const char *bloblist_tag_name(enum bloblist_tag_t tag);
  * bloblist_reloc() - Relocate the bloblist and optionally resize it
  *
  * @to: Pointer to new bloblist location (must not overlap old location)
- * @to_size: New size for bloblist (must be larger than from_size)
- * @from: Pointer to bloblist to relocate
- * @from_size: Size of bloblist to relocate
+ * @to_size: New size for bloblist
+ * Return: 0 if OK, -ENOSPC if the new size is small than the bloblist total
+ *	   size.
  */
-void bloblist_reloc(void *to, uint to_size, void *from, uint from_size);
+int bloblist_reloc(void *to, uint to_size);
 
 /**
  * bloblist_init() - Init the bloblist system with a single bloblist
diff --git a/test/bloblist.c b/test/bloblist.c
index 7dab9addf8..1c60bbac36 100644
--- a/test/bloblist.c
+++ b/test/bloblist.c
@@ -376,13 +376,12 @@ static int bloblist_test_reloc(struct unit_test_state *uts)
 {
 	const uint large_size = TEST_BLOBLIST_SIZE;
 	const uint small_size = 0x20;
-	void *old_ptr, *new_ptr;
+	void *new_ptr;
 	void *blob1, *blob2;
 	ulong new_addr;
 	ulong new_size;
 
 	ut_assertok(bloblist_new(TEST_ADDR, TEST_BLOBLIST_SIZE, 0, 0));
-	old_ptr = map_sysmem(TEST_ADDR, TEST_BLOBLIST_SIZE);
 
 	/* Add one blob and then one that won't fit */
 	blob1 = bloblist_add(TEST_TAG, small_size, 0);
@@ -394,8 +393,7 @@ static int bloblist_test_reloc(struct unit_test_state *uts)
 	new_addr = TEST_ADDR + TEST_BLOBLIST_SIZE;
 	new_size = TEST_BLOBLIST_SIZE + 0x100;
 	new_ptr = map_sysmem(new_addr, TEST_BLOBLIST_SIZE);
-	bloblist_reloc(new_ptr, new_size, old_ptr, TEST_BLOBLIST_SIZE);
-	gd->bloblist = new_ptr;
+	ut_assertok(bloblist_reloc(new_ptr, new_size));
 
 	/* Check the old blob is there and that we can now add the bigger one */
 	ut_assertnonnull(bloblist_find(TEST_TAG, small_size));
-- 
2.25.1