[LTP] [PATCH] fix 'reading beyond file size' testcase in diotest4

[Anton G. <agl...@pa...>]

Something goes wrong if we are allowed to read, or
we are not allowed to read, but we've got unexpected errno.
---
 testcases/kernel/io/direct_io/diotest4.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/testcases/kernel/io/direct_io/diotest4.c b/testcases/kernel/io/direct_io/diotest4.c
index 1debd82..3546a50 100644
--- a/testcases/kernel/io/direct_io/diotest4.c
+++ b/testcases/kernel/io/direct_io/diotest4.c
@@ -298,7 +298,7 @@ main(int argc, char *argv[])
 	}
 	else {
         	ret = read(fd, buf2, count);
-        	if (ret < 0) { //Check Error Condition only when read() returns < 0  
+        	if (ret > 0 || (ret < 0 && errno != EINVAL)) {
                 	tst_resm(TFAIL,"allows read beyond file size. returns %d: %s",
 				ret, strerror(errno));
                 	failed = TRUE;
-- 
1.5.4.1