Fix coverity defects: CID 147540, 147542

CID 147540: unsigned_compare
- Cast nsec to a int32_t to properly detect the expected overflow.
CID 147542: unsigned_compare
- intval can never be less than ZIO_FAILURE_MODE_WAIT which is
  defined to be zero.  Remove this useless check.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: cao.xuewen <[email protected]>
Closes #5379 

1 files changed, 1 insertions, 1 deletions

diff --git a/include/zpios-ctl.h b/include/zpios-ctl.h
index aee4f0a50..90efcb1b1 100644
--- a/include/zpios-ctl.h
+++ b/include/zpios-ctl.h
@@ -146,7 +146,7 @@ zpios_timespec_normalize(zpios_timespec_t *ts, uint32_t sec, uint32_t nsec)
 		nsec -= NSEC_PER_SEC;
 		sec++;
 	}
-	while (nsec < 0) {
+	while (((int32_t)nsec) < 0) {
 		nsec += NSEC_PER_SEC;
 		sec--;
 	}