From 10e3d620b46e0f28aebc858e058c52a4a63e9a91 Mon Sep 17 00:00:00 2001
From: Greg Kaiser <gkaiser@google.com>
Date: Thu, 19 Nov 2020 16:15:48 -0800
Subject: [PATCH] dmuserd: Fix error checking

We change read_all() and write_all() to return signed values, so
our negative error return values will be correctly caught.

Test: TreeHugger
Change-Id: I4d03d4475bccb40ae4b84a846966139b34ede2bd
---
 fs_mgr/tools/dmuserd.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs_mgr/tools/dmuserd.cpp b/fs_mgr/tools/dmuserd.cpp
index 92f587860..e50a4a281 100644
--- a/fs_mgr/tools/dmuserd.cpp
+++ b/fs_mgr/tools/dmuserd.cpp
@@ -76,7 +76,7 @@ struct dm_user_message {
 
 static bool verbose = false;
 
-size_t write_all(int fd, void* buf, size_t len) {
+ssize_t write_all(int fd, void* buf, size_t len) {
     char* buf_c = (char*)buf;
     ssize_t total = 0;
     ssize_t once;
@@ -94,7 +94,7 @@ size_t write_all(int fd, void* buf, size_t len) {
     return total;
 }
 
-size_t read_all(int fd, void* buf, size_t len) {
+ssize_t read_all(int fd, void* buf, size_t len) {
     char* buf_c = (char*)buf;
     ssize_t total = 0;
     ssize_t once;