[net-next, PATCH v2] net: stmmac: use correct define to get rx timestamp on GMAC4

[Alexandre Torgue]

In dwmac4_wrback_get_rx_timestamp_status we looking for a RX timestamp.
For that receive descriptors are handled and so we should use defines
related to receive descriptors. It'll no change the functional behavior
as RDES3_RDES1_VALID=TDES3_RS1V=BIT(26) but it makes code easier to read.

Signed-off-by: Alexandre Torgue <alexandre.tor...@st.com>

---

changes since v1:
 *use le32_to_cpu to handle endianess

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c 
b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
index 20299f6..90045ff 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
@@ -268,7 +268,7 @@ static int dwmac4_wrback_get_rx_timestamp_status(void 
*desc, void *next_desc,
        int ret = -EINVAL;
 
        /* Get the status from normal w/b descriptor */
-       if (likely(p->des3 & TDES3_RS1V)) {
+       if (likely(le32_to_cpu(p->des3) & RDES3_RDES1_VALID)) {
                if (likely(le32_to_cpu(p->des1) & RDES1_TIMESTAMP_AVAILABLE)) {
                        int i = 0;
 
-- 
2.7.4