[PATCH net v4 2/4] net: ethernet: oa_tc6: No return on rx buffer overflow error

[Selvamani Rajagopal via B4 Relay <devnull+Selvamani.Rajagopal.onsemi.com@kernel.org>]

From: Selvamani Rajagopal <Selvamani.Rajagopal@onsemi.com>

On RX buffer overflow error, the bad data chunks must
be thrown away and code should look for a data chunk with
"start valid" bit set, which would indicate next valid MAC
frame. In this change, oa_tc6_try_spi_transfer is called
again if it returns error code EAGAIN. This helps to
recover from the error gracefully.

Fixes: 2c6ce5354453 ("net: ethernet: oa_tc6: implement mac-phy interrupt")
Signed-off-by: Selvamani Rajagopal <Selvamani.Rajagopal@onsemi.com>

Changes in v4:
   new patch
---
 drivers/net/ethernet/oa_tc6.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index e2c0843207f2..20c9e98d1d60 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -1111,6 +1111,8 @@ static irqreturn_t oa_tc6_macphy_threaded_irq(int irq, void *data)
 
 	while (tc6->int_flag || (tc6->waiting_tx_skb && tc6->tx_credits)) {
 		ret = oa_tc6_try_spi_transfer(tc6);
+		if (ret == -EAGAIN)
+			continue;
 		if (ret)
 			break;
 	}

-- 
2.43.0