6.6-stable review patch. If anyone has any objections, please let me know.
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From: Stefan Wahren wahrenst@gmx.net
[ Upstream commit 55f362885951b2d00fd7fbb02ef0227deea572c2 ]
The MSE102x doesn't provide any SPI commands for interrupt handling. So in case the interrupt fired before the driver requests the IRQ, the interrupt will never fire again. In order to fix this always poll for pending packets after opening the interface.
Fixes: 2f207cbf0dd4 ("net: vertexcom: Add MSE102x SPI support") Signed-off-by: Stefan Wahren wahrenst@gmx.net Reviewed-by: Andrew Lunn andrew@lunn.ch Link: https://patch.msgid.link/20250430133043.7722-2-wahrenst@gmx.net Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/vertexcom/mse102x.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/vertexcom/mse102x.c b/drivers/net/ethernet/vertexcom/mse102x.c index 8f67c39f479ee..45f4d2cb5b31a 100644 --- a/drivers/net/ethernet/vertexcom/mse102x.c +++ b/drivers/net/ethernet/vertexcom/mse102x.c @@ -509,6 +509,7 @@ static irqreturn_t mse102x_irq(int irq, void *_mse) static int mse102x_net_open(struct net_device *ndev) { struct mse102x_net *mse = netdev_priv(ndev); + struct mse102x_net_spi *mses = to_mse102x_spi(mse); int ret;
ret = request_threaded_irq(ndev->irq, NULL, mse102x_irq, IRQF_ONESHOT, @@ -524,6 +525,13 @@ static int mse102x_net_open(struct net_device *ndev)
netif_carrier_on(ndev);
+ /* The SPI interrupt can stuck in case of pending packet(s). + * So poll for possible packet(s) to re-arm the interrupt. + */ + mutex_lock(&mses->lock); + mse102x_rx_pkt_spi(mse); + mutex_unlock(&mses->lock); + netif_dbg(mse, ifup, ndev, "network device up\n");
return 0;