From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit ef45e8400f5bb66b03cc949f76c80e2a118447de ]
Most kernel functions return negative error codes but some irq functions return zero on error. In this code irq_of_parse_and_map(), returns zero and platform_get_irq() returns negative error codes. We need to handle both cases appropriately.
Fixes: 8425c41d1ef7 ("net: ll_temac: Extend support to non-device-tree platforms") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Acked-by: Esben Haabendal esben@geanix.com Reviewed-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: Harini Katakam harini.katakam@amd.com Link: https://lore.kernel.org/r/3d0aef75-06e0-45a5-a2a6-2cc4738d4143@moroto.mounta... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/xilinx/ll_temac_main.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c index 9756d83994fca..86edc95919146 100644 --- a/drivers/net/ethernet/xilinx/ll_temac_main.c +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c @@ -1481,12 +1481,16 @@ static int temac_probe(struct platform_device *pdev) }
/* Error handle returned DMA RX and TX interrupts */ - if (lp->rx_irq < 0) - return dev_err_probe(&pdev->dev, lp->rx_irq, + if (lp->rx_irq <= 0) { + rc = lp->rx_irq ?: -EINVAL; + return dev_err_probe(&pdev->dev, rc, "could not get DMA RX irq\n"); - if (lp->tx_irq < 0) - return dev_err_probe(&pdev->dev, lp->tx_irq, + } + if (lp->tx_irq <= 0) { + rc = lp->tx_irq ?: -EINVAL; + return dev_err_probe(&pdev->dev, rc, "could not get DMA TX irq\n"); + }
if (temac_np) { /* Retrieve the MAC address */