From: Valentine Barshak valentine.barshak@cogentembedded.com
In case RX error occurs, and the RD_RFE bit is set, the descriptor is never returned back to the queue. Make sh_eth_recv_start return zero length in this case so that the descriptor can be released and pushed back to the list. Also return the more appropriate -EAGAIN instead of -EINVAL if the descriptor is not ready yet.
Signed-off-by: Valentine Barshak valentine.barshak@cogentembedded.com Reviewed-by: Marek Vasut marek.vasut+renesas@mailbox.org --- Cc: Geert Uytterhoeven geert+renesas@glider.be Cc: Joe Hershberger joe.hershberger@ni.com Cc: Michal Simek michal.simek@amd.com Cc: Nishanth Menon nm@ti.com Cc: Ramon Fried rfried.dev@gmail.com --- drivers/net/sh_eth.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c index 7314caadfdc..7b1f59dc498 100644 --- a/drivers/net/sh_eth.c +++ b/drivers/net/sh_eth.c @@ -129,11 +129,11 @@ static int sh_eth_recv_start(struct sh_eth_dev *eth) /* Check if the rx descriptor is ready */ invalidate_cache(port_info->rx_desc_cur, sizeof(struct rx_desc_s)); if (port_info->rx_desc_cur->rd0 & RD_RACT) - return -EINVAL; + return -EAGAIN;
/* Check for errors */ if (port_info->rx_desc_cur->rd0 & RD_RFE) - return -EINVAL; + return 0;
return port_info->rx_desc_cur->rd1 & 0xffff; } @@ -556,15 +556,13 @@ static int sh_ether_recv(struct udevice *dev, int flags, uchar **packetp) *packetp = packet;
return len; - } else { - len = 0; + }
- /* Restart the receiver if disabled */ - if (!(sh_eth_read(port_info, EDRRR) & EDRRR_R)) - sh_eth_write(port_info, EDRRR_R, EDRRR); + /* Restart the receiver if disabled */ + if (!(sh_eth_read(port_info, EDRRR) & EDRRR_R)) + sh_eth_write(port_info, EDRRR_R, EDRRR);
- return -EAGAIN; - } + return len; }
static int sh_ether_free_pkt(struct udevice *dev, uchar *packet, int length)