fs: open: fix zfp flags not set when calling truncate

If filesystem relies on zfp flags being set after open, this can lead to
inconsistency with the current implementation of FS_O_TRUNC.
Move the assignment of zfp->flags before any other call to fs api to avoid
such issues.

Signed-off-by: Pierrick Guillaume <[email protected]>

Author: Fymyte

subsys/fs/fs.c

@@ -182,6 +182,9 @@ int fs_open(struct fs_file_t *zfp, const char *file_name, fs_mode_t flags)
 		return rc;
 	}
 
+	/* Copy flags to zfp for use with other fs_ API calls */
+	zfp->flags = flags;
+
 	if (truncate_file) {
 		/* Truncate the opened file to 0 length */
 		rc = mp->fs->truncate(zfp, 0);
@@ -192,9 +195,6 @@ int fs_open(struct fs_file_t *zfp, const char *file_name, fs_mode_t flags)
 		}
 	}
 
-	/* Copy flags to zfp for use with other fs_ API calls */
-	zfp->flags = flags;
-
 	return rc;
 }