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-rw-r--r--erts/emulator/sys/unix/sys_drivers.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/erts/emulator/sys/unix/sys_drivers.c b/erts/emulator/sys/unix/sys_drivers.c
index 812112fb91..e08ef41817 100644
--- a/erts/emulator/sys/unix/sys_drivers.c
+++ b/erts/emulator/sys/unix/sys_drivers.c
@@ -765,9 +765,14 @@ static ErlDrvData spawn_start(ErlDrvPort port_num, char* name,
if (res < (buffsz + sizeof(buffsz))) {
/* we only wrote part of the command payload. Enqueue the rest. */
for (i = 0; i < iov_len; i++) {
- driver_enq(port_num, io_vector[i].iov_base, io_vector[i].iov_len);
+ if (res >= io_vector[i].iov_len)
+ res -= io_vector[i].iov_len;
+ else {
+ driver_enq(port_num, io_vector[i].iov_base + res,
+ io_vector[i].iov_len - res);
+ res = 0;
+ }
}
- driver_deq(port_num, res);
driver_select(port_num, ofd[1], ERL_DRV_WRITE|ERL_DRV_USE, 1);
}