[PATCH u-boot-marvell 11/14] tools: kwboot: Handle EINTR in kwboot_write()

Marek Behún
2022-01-25T17:15:32Z

From: Pali Rohár <pali@kernel.org>

The write() syscall may be interrupted. Handle EINTR and retry it.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
---
tools/kwboot.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c
index de433c1b04..8b748f0fdd 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -292,13 +292,15 @@ static int blk_rsp_timeo = KWBOOT_BLK_RSP_TIMEO;
static ssize_t
kwboot_write(int fd, const char *buf, size_t len)
{
- size_t tot = 0;
+ ssize_t tot = 0;

while (tot < len) {
ssize_t wr = write(fd, buf + tot, len - tot);

- if (wr < 0)
- return -1;
+ if (wr < 0 && errno == EINTR)
+ continue;
+ else if (wr < 0)
+ return wr;

tot += wr;
}
--
2.34.1