[PATCH 4/5] libfile: drop TFTP-specific hack in open_fdt()

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Now that TFTP internally does the equivalent of closing and reopening
a file when seeking back, switch to using that in open_fdt() instead
of open-coding it.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 lib/libfile.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/lib/libfile.c b/lib/libfile.c
index f5cea7b94998..0670ef0584cb 100644
--- a/lib/libfile.c
+++ b/lib/libfile.c
@@ -976,7 +976,7 @@ int open_fdt(const char *filename, size_t *size)
 	if (ret)
 		goto err;
 
-	ret = pread_full(fd, &fdt_hdr, sizeof(fdt_hdr), 0);
+	ret = read_full(fd, &fdt_hdr, sizeof(fdt_hdr));
 	if (ret >= 0 && ret < sizeof(fdt_hdr))
 		ret = -EILSEQ;
 	if (ret < 0)
@@ -988,13 +988,12 @@ int open_fdt(const char *filename, size_t *size)
 		goto err;
 	}
 
-	close(fd);
-
-	/* HACK: TFTP doesn't support backwards seeking, so reopen afresh */
-	fd = open(filename, O_RDONLY);
-	if (fd >= 0)
-		*size = fdt_size;
+	if (lseek(fd, 0, SEEK_SET) != 0) {
+		ret = -errno;
+		goto err;
+	}
 
+        *size = fdt_size;
 	return fd;
 err:
 	close(fd);
-- 
2.47.3