commit c547ad481dca5bc0b0a2e365ebcff3439848f664
Author: Rohan Sable <rsable@redhat.com>
Date:   Mon Feb 14 11:15:22 2022 -0500

    mount.nfs Fix error reporting for already mounted shares
    
    When mount is triggered for an already mounted
    share (using auto negotiation), it displays
    "mount.nfs: Protocol not supported" or
    "mount.nfs: access denied by server while mounting"
    instead of EBUSY. This easily causes confusion if
    the mount was not tried verbose :
    
    Signed-off-by: Rohan Sable <rsable@redhat.com>
    Signed-off-by: Yongcheng Yang <yoyang@redhat.com>
    Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index 3c4e218a..573df6ee 100644
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -973,7 +973,9 @@ fall_back:
 	if ((result = nfs_try_mount_v3v2(mi, FALSE)))
 		return result;
 
-	errno = olderrno;
+	if (errno != EBUSY && errno != EACCES)
+		errno = olderrno;
+
 	return result;
 }