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| author | Alexandre TORGUE <alexandre.torgue@st.com> | 2016-04-08 11:18:03 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-13 22:35:17 -0400 |
| commit | 18b46810eb61f1d1a66c5511d12e84ea8cb7f35c (patch) | |
| tree | 9118e219d45137a2ea07a32f4476f0d3d8fca25b /drivers | |
| parent | fbf405e80c8af9ba0a9eb6f52d3bb8cddacd6036 (diff) | |
| download | linux-rpi-18b46810eb61f1d1a66c5511d12e84ea8cb7f35c.tar.gz linux-rpi-18b46810eb61f1d1a66c5511d12e84ea8cb7f35c.tar.bz2 linux-rpi-18b46810eb61f1d1a66c5511d12e84ea8cb7f35c.zip | |
net: ethernet: stmmac: GMAC4.xx: Fix TX descriptor preparation
On GMAC4.xx each descriptor contains 2 buffers of 16KB (each).
Initially, those 2 buffers was filled in dwmac4_rd_prepare_tx_desc but
it is actually not needed. Indeed, stmmac driver supports frame up to
9000 bytes (jumbo). So only one buffer is needed.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c index d4952c7a836d..4ec7397e7fb3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c @@ -254,14 +254,7 @@ static void dwmac4_rd_prepare_tx_desc(struct dma_desc *p, int is_fs, int len, { unsigned int tdes3 = p->des3; - if (unlikely(len > BUF_SIZE_16KiB)) { - p->des2 |= (((len - BUF_SIZE_16KiB) << - TDES2_BUFFER2_SIZE_MASK_SHIFT) - & TDES2_BUFFER2_SIZE_MASK) - | (BUF_SIZE_16KiB & TDES2_BUFFER1_SIZE_MASK); - } else { - p->des2 |= (len & TDES2_BUFFER1_SIZE_MASK); - } + p->des2 |= (len & TDES2_BUFFER1_SIZE_MASK); if (is_fs) tdes3 |= TDES3_FIRST_DESCRIPTOR; |