[PATCH v2] tools: ftdgrep: correct the find regions loop in do_fdtgrep

[Patrick Delaunay]

Use realloc and update the loop executed in do_fdtgrep to find all
the regions: only test count > max_region after the second pass.

This patch solve an issue if the number of region found (count)
is greater then the default value (max_region = count = 100):
the second pass is never executed, because the loop stops after
the first pass (i = 0, count > 100, max_regions = 100)
with error -1 and the error message
"Internal error with fdtgrep_find_region".

I also update the error message.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

Changes in v2:
- Change malloc to realloc to avoid memory leak.

 tools/fdtgrep.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/fdtgrep.c b/tools/fdtgrep.c
index 8f44f599c1..2a8058f57f 100644
--- a/tools/fdtgrep.c
+++ b/tools/fdtgrep.c
@@ -805,7 +805,7 @@ static int do_fdtgrep(struct display_info *disp, const char *filename)
 	 * we do another pass to actually record them.
 	 */
 	for (i = 0; i < 2; i++) {
-		region = malloc(count * sizeof(struct fdt_region));
+		region = realloc(region, count * sizeof(struct fdt_region));
 		if (!region) {
 			fprintf(stderr, "Out of memory for %d regions\n",
 				count);
@@ -823,8 +823,10 @@ static int do_fdtgrep(struct display_info *disp, const char *filename)
 		}
 		if (count <= max_regions)
 			break;
+	}
+	if (count > max_regions) {
 		free(region);
-		fprintf(stderr, "Internal error with fdtgrep_find_region)(\n");
+		fprintf(stderr, "Internal error with fdtgrep_find_region()\n");
 		return -1;
 	}
 
-- 
2.17.1