diff options
| author |   Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2010-07-27 00:09:47 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-07-27 20:43:50 -0700 |
| commit | 3eeb29972b1139f733f7269def527900729f4cc7 (patch) | |
| tree | 7189feaee380e0921c65935879e65030b01d9560 /drivers/net/stmmac/dwmac1000.h | |
| parent | stmmac: fix timer setup when use dual mac Kconfig (diff) | |
| download | linux-dev-3eeb29972b1139f733f7269def527900729f4cc7.tar.xz linux-dev-3eeb29972b1139f733f7269def527900729f4cc7.zip | |
stmmac: fix automatic PAD/FCS stripping
For Simple Ethernet frames (802.2 and 802.3) the GMAC Core
never strips pad and fcs. This means the ACS has no effect
on IPv4/6 frames.
The FL bits, in the RDES0, include the FCS so the driver
has to remove it in SW.
For 802.3 frame format with LLC or LLC-SNAP, when set the ACS
bit, the HW strips both PAD and FCS.
The FL bits, in the RDES0, actually represents the frame length
already stripped.
This patch fixes this logic within the device driver that
erroneously removed 4byte from 802.3 frames already stripped
corrupting the payload.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/stmmac/dwmac1000.h')
| -rw-r--r-- | drivers/net/stmmac/dwmac1000.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/stmmac/dwmac1000.h b/drivers/net/stmmac/dwmac1000.h index d8d0f3553770..8b20b19971cb 100644 --- a/drivers/net/stmmac/dwmac1000.h +++ b/drivers/net/stmmac/dwmac1000.h @@ -93,7 +93,7 @@ enum inter_frame_gap { #define GMAC_CONTROL_IPC 0x00000400 /* Checksum Offload */ #define GMAC_CONTROL_DR 0x00000200 /* Disable Retry */ #define GMAC_CONTROL_LUD 0x00000100 /* Link up/down */ -#define GMAC_CONTROL_ACS 0x00000080 /* Automatic Pad Stripping */ +#define GMAC_CONTROL_ACS 0x00000080 /* Automatic Pad/FCS Stripping */ #define GMAC_CONTROL_DC 0x00000010 /* Deferral Check */ #define GMAC_CONTROL_TE 0x00000008 /* Transmitter Enable */ #define GMAC_CONTROL_RE 0x00000004 /* Receiver Enable */ |