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net: ethernet: mtk_eth_soc: only use legacy mode on missing IRQ name

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If platform_get_irq_byname returns -ENXIO fall back to legacy (index
based) mode, but on other errors function should return this error.

Suggested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250619132125.78368-5-linux@fw-web.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Frank Wunderlich 2025-06-19 15:21:24 +02:00 committed by Jakub Kicinski
parent 9c0feca0a6
commit 070e98dd4e
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@ -3346,6 +3346,13 @@ static int mtk_get_irqs(struct platform_device *pdev, struct mtk_eth *eth)
if (eth->irq[MTK_FE_IRQ_TX] >= 0 && eth->irq[MTK_FE_IRQ_RX] >= 0)
return 0;
/* only use legacy mode if platform_get_irq_byname returned -ENXIO */
if (eth->irq[MTK_FE_IRQ_TX] != -ENXIO)
return eth->irq[MTK_FE_IRQ_TX];
if (eth->irq[MTK_FE_IRQ_RX] != -ENXIO)
return eth->irq[MTK_FE_IRQ_RX];
/* legacy way:
* On MTK_SHARED_INT SoCs (MT7621 + MT7628) the first IRQ is taken
* from devicetree and used for both RX and TX - it is shared.