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29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
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From 7c83e28f10830aa5105c25eaabe890e3adac36aa Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Tue, 9 May 2023 03:20:06 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: fix NULL pointer dereference
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Check for NULL pointer to avoid kernel crashing in case of missing WO
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firmware in case only a single WEDv2 device has been initialized, e.g. on
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MT7981 which can connect just one wireless frontend.
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Fixes: 86ce0d09e424 ("net: ethernet: mtk_eth_soc: use WO firmware for MT7981")
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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Reviewed-by: Simon Horman <simon.horman@corigine.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/mediatek/mtk_wed.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/net/ethernet/mediatek/mtk_wed.c
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+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
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@@ -647,7 +647,7 @@ __mtk_wed_detach(struct mtk_wed_device *
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BIT(hw->index), BIT(hw->index));
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}
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- if (!hw_list[!hw->index]->wed_dev &&
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+ if ((!hw_list[!hw->index] || !hw_list[!hw->index]->wed_dev) &&
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hw->eth->dma_dev != hw->eth->dev)
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mtk_eth_set_dma_device(hw->eth, hw->eth->dev);
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