cifs: print warning when conflicting soft vs. hard mount options specified

If the user specifies conflicting hard vs. soft mount options
(or nosoft vs. nohard) print a warning to dmesg

We were missing a warning when a user e.g. mounted with both
"hard,soft" mount options.

Reviewed-by: Paulo Alcantara (SUSE) <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: smfrench

fs/cifs/fs_context.c

@@ -884,16 +884,21 @@ static int smb3_fs_context_parse_param(struct fs_context *fc,
 		ctx->nodfs = 1;
 		break;
 	case Opt_hard:
-		if (result.negated)
+		if (result.negated) {
+			if (ctx->retry == 1)
+				cifs_dbg(VFS, "conflicting hard vs. soft mount options\n");
 			ctx->retry = 0;
-		else
+		} else
 			ctx->retry = 1;
 		break;
 	case Opt_soft:
 		if (result.negated)
 			ctx->retry = 1;
-		else
+		else {
+			if (ctx->retry == 1)
+				cifs_dbg(VFS, "conflicting hard vs soft mount options\n");
 			ctx->retry = 0;
+		}
 		break;
 	case Opt_mapposix:
 		if (result.negated)