Save some computation time and avoid calculating CRC's frame
Cc: Peter Maydell <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Andrey Smirnov <[email protected]>
---
hw/net/imx_fec.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c
index 88b4b049d7..75822344fc 100644
--- a/hw/net/imx_fec.c
+++ b/hw/net/imx_fec.c
@@ -1032,9 +1032,7 @@ static ssize_t imx_enet_receive(NetClientState *nc, const
uint8_t *buf,
IMXENETBufDesc bd;
uint32_t flags = 0;
uint32_t addr;
- uint32_t crc;
uint32_t buf_addr;
- uint8_t *crc_ptr;
unsigned int buf_len;
size_t size = len;
@@ -1048,8 +1046,6 @@ static ssize_t imx_enet_receive(NetClientState *nc, const
uint8_t *buf,
/* 4 bytes for the CRC. */
size += 4;
- crc = cpu_to_be32(crc32(~0, buf, size));
- crc_ptr = (uint8_t *) &crc;
/* Huge frames are truncted. */
if (size > ENET_MAX_FRAME_SIZE) {
@@ -1090,9 +1086,10 @@ static ssize_t imx_enet_receive(NetClientState *nc,
const uint8_t *buf,
dma_memory_write(&address_space_memory, buf_addr, buf, buf_len);
buf += buf_len;
if (size < 4) {
+ const uint8_t zeros[4] = { 0 };
+
dma_memory_write(&address_space_memory, buf_addr + buf_len,
- crc_ptr, 4 - size);
- crc_ptr += 4 - size;
+ zeros, 4 - size);
}
bd.flags &= ~ENET_BD_E;
if (size == 0) {
--
2.13.5
