diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2013-06-13 10:15:45 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-13 03:02:32 -0700 |
| commit | dd019897358b815f7828dab90b51d51df4d3658d (patch) | |
| tree | 57a29570fe3e6f47f845a396564b3bc7553e4387 | |
| parent | d3b6f6141831b6e2d414edea6cc7af5b9bc6fac2 (diff) | |
net: sh_eth: fix incorrect RX length error if R8A7740
This patch fixes an issue that the driver increments the "RX length error"
on every buffer in sh_eth_rx() if the R8A7740.
This patch also adds a description about the Receive Frame Status bits.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index b4479b5aaee..5e3982fc539 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1401,16 +1401,23 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status) desc_status = edmac_to_cpu(mdp, rxdesc->status); pkt_len = rxdesc->frame_length; -#if defined(CONFIG_ARCH_R8A7740) - desc_status >>= 16; -#endif - if (--boguscnt < 0) break; if (!(desc_status & RDFEND)) ndev->stats.rx_length_errors++; +#if defined(CONFIG_ARCH_R8A7740) + /* + * In case of almost all GETHER/ETHERs, the Receive Frame State + * (RFS) bits in the Receive Descriptor 0 are from bit 9 to + * bit 0. However, in case of the R8A7740's GETHER, the RFS + * bits are from bit 25 to bit 16. So, the driver needs right + * shifting by 16. + */ + desc_status >>= 16; +#endif + if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 | RD_RFS5 | RD_RFS6 | RD_RFS10)) { ndev->stats.rx_errors++; |