stmmac: use one memset() to reset TDES01

Use one memset() to reset all TDES01 fields instead
of one by one to reduce number of instructions.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 17 deletions

diff --git a/drivers/net/stmmac/enh_desc.c b/drivers/net/stmmac/enh_desc.c
index 77ff88c3958b..5d1471d8f8f6 100644
--- a/drivers/net/stmmac/enh_desc.c
+++ b/drivers/net/stmmac/enh_desc.c
@@ -284,7 +284,7 @@ static void enh_desc_release_tx_desc(struct dma_desc *p)
 {
         int ter = p->des01.etx.end_ring;
 
-        memset(p, 0, sizeof(struct dma_desc));
+        memset(p, 0, offsetof(struct dma_desc, des2));
         p->des01.etx.end_ring = ter;
 }
 
diff --git a/drivers/net/stmmac/norm_desc.c b/drivers/net/stmmac/norm_desc.c
index 51f4440ab98b..0dce90cb8124 100644
--- a/drivers/net/stmmac/norm_desc.c
+++ b/drivers/net/stmmac/norm_desc.c
@@ -174,22 +174,7 @@ static void ndesc_release_tx_desc(struct dma_desc *p)
 {
         int ter = p->des01.tx.end_ring;
 
-        /* clean field used within the xmit */
-        p->des01.tx.first_segment = 0;
-        p->des01.tx.last_segment = 0;
-        p->des01.tx.buffer1_size = 0;
-
-        /* clean status reported */
-        p->des01.tx.error_summary = 0;
-        p->des01.tx.underflow_error = 0;
-        p->des01.tx.no_carrier = 0;
-        p->des01.tx.loss_carrier = 0;
-        p->des01.tx.excessive_deferral = 0;
-        p->des01.tx.excessive_collisions = 0;
-        p->des01.tx.late_collision = 0;
-        p->des01.tx.heartbeat_fail = 0;
-        p->des01.tx.deferred = 0;
-
+        memset(p, 0, offsetof(struct dma_desc, des2));
         /* set termination field */
         p->des01.tx.end_ring = ter;
 }