caif-hsi: Bugfix - Piggyback'ed embedded CAIF frame lost

When receiving a piggyback'ed descriptor containing an
embedded frame, but no payload, the embedded frame was
lost.
Signed-off-by: NPer Ellefsen <per.ellefsen@stericsson.com>
Signed-off-by: NSjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/caif/caif_hsi.c

@@ -693,8 +693,6 @@ static void cfhsi_rx_done(struct cfhsi *cfhsi)
 			 */
 			memcpy(rx_buf, (u8 *)piggy_desc,
 					CFHSI_DESC_SHORT_SZ);
-			/* Mark no embedded frame here */
-			piggy_desc->offset = 0;
 			if (desc_pld_len == -EPROTO)
 				goto out_of_sync;
 		}
@@ -737,6 +735,8 @@ static void cfhsi_rx_done(struct cfhsi *cfhsi)
 			/* Extract any payload in piggyback descriptor. */
 			if (cfhsi_rx_desc(piggy_desc, cfhsi) < 0)
 				goto out_of_sync;
+			/* Mark no embedded frame after extracting it */
+			piggy_desc->offset = 0;
 		}
 	}