mfd: rave-sp: Check received frame length before accepting next byte

[linux-2.6-microblaze.git] / drivers / mfd / rave-sp.c

diff --git a/drivers/mfd/rave-sp.c b/drivers/mfd/rave-sp.c
index b704160..cb0cc9d 100644 (file)
--- a/drivers/mfd/rave-sp.c
+++ b/drivers/mfd/rave-sp.c
@@ -546,8 +546,6 @@ static int rave_sp_receive_buf(struct serdev_device *serdev,
                        /* FALLTHROUGH */
 
                case RAVE_SP_EXPECT_ESCAPED_DATA:
-                       deframer->data[deframer->length++] = byte;
-
                        if (deframer->length == sizeof(deframer->data)) {
                                dev_warn(dev, "Bad frame: Too long\n");
                                /*
@@ -562,6 +560,8 @@ static int rave_sp_receive_buf(struct serdev_device *serdev,
                                goto reset_framer;
                        }
 
+                       deframer->data[deframer->length++] = byte;
+
                        /*
                         * We've extracted out special byte, now we
                         * can go back to regular data collecting