diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index b20f5a887a53..624d76e0ca01 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6624,12 +6624,16 @@ static int btrfs_trim_free_extents_throttle(struct btrfs_device *device,
 
 	*trimmed = 0;
 
-	/* Discard not supported = nothing to do. */
-	if (!bdev_max_discard_sectors(device->bdev))
+	/*
+	 * The caller only filters out MISSING devices, but a device that was
+	 * missing at mount and later rescanned has MISSING cleared while bdev
+	 * is still NULL and WRITEABLE is still unset. Skip those here.
+	 */
+	if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) || !device->bdev)
 		return 0;
 
-	/* Not writable = nothing to do. */
-	if (!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state))
+	/* Discard not supported = nothing to do. */
+	if (!bdev_max_discard_sectors(device->bdev))
 		return 0;
 
 	/* No free space = nothing to do. */