[PATCH] arch: fix without checked-return value with lseek

[Bo YU]

lseek should have returned value but we miss it maybe.
This is detected by Coverity scan:
CID: 1440481

Signed-off-by: Bo YU <tsu.y...@gmail.com>
---
 arch/powerpc/boot/addnote.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/boot/addnote.c b/arch/powerpc/boot/addnote.c
index 9d9f6f334d3c..3da3e2b1b51b 100644
--- a/arch/powerpc/boot/addnote.c
+++ b/arch/powerpc/boot/addnote.c
@@ -223,7 +223,11 @@ main(int ac, char **av)
        PUT_16(E_PHNUM, np + 2);
 
        /* write back */
-       lseek(fd, (long) 0, SEEK_SET);
+       i = lseek(fd, (long) 0, SEEK_SET);
+       if (i < 0) {
+               perror("lseek");
+               exit(1);
+       }
        i = write(fd, buf, n);
        if (i < 0) {
                perror("write");
-- 
2.11.0