* [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region()
@ 2025-07-15 23:01 Dan Carpenter
2025-07-16 7:21 ` Lorenzo Bianconi
2025-07-18 2:00 ` patchwork-bot+netdevbpf
0 siblings, 2 replies; 3+ messages in thread
From: Dan Carpenter @ 2025-07-15 23:01 UTC (permalink / raw)
To: Rob Herring
Cc: Felix Fietkau, Sean Wang, Lorenzo Bianconi, Andrew Lunn,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Matthias Brugger, AngeloGioacchino Del Regno, netdev,
linux-kernel, linux-arm-kernel, linux-mediatek, kernel-janitors
We recently changed this from using devm_ioremap() to using
devm_ioremap_resource() and unfortunately the former returns NULL while
the latter returns error pointers. The check for errors needs to be
updated as well.
Fixes: e27dba1951ce ("net: Use of_reserved_mem_region_to_resource{_byname}() for "memory-region"")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
index 8498b35ec7a6..fa6b21603416 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
@@ -247,8 +247,10 @@ mtk_wed_get_memory_region(struct mtk_wed_hw *hw, const char *name,
region->phy_addr = res.start;
region->size = resource_size(&res);
region->addr = devm_ioremap_resource(hw->dev, &res);
+ if (IS_ERR(region->addr))
+ return PTR_ERR(region->addr);
- return !region->addr ? -EINVAL : 0;
+ return 0;
}
static int
--
2.47.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region()
2025-07-15 23:01 [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region() Dan Carpenter
@ 2025-07-16 7:21 ` Lorenzo Bianconi
2025-07-18 2:00 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: Lorenzo Bianconi @ 2025-07-16 7:21 UTC (permalink / raw)
To: Dan Carpenter
Cc: Rob Herring, Felix Fietkau, Sean Wang, Andrew Lunn,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Matthias Brugger, AngeloGioacchino Del Regno, netdev,
linux-kernel, linux-arm-kernel, linux-mediatek, kernel-janitors
[-- Attachment #1: Type: text/plain, Size: 1222 bytes --]
> We recently changed this from using devm_ioremap() to using
> devm_ioremap_resource() and unfortunately the former returns NULL while
> the latter returns error pointers. The check for errors needs to be
> updated as well.
>
> Fixes: e27dba1951ce ("net: Use of_reserved_mem_region_to_resource{_byname}() for "memory-region"")
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
> ---
> drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
> index 8498b35ec7a6..fa6b21603416 100644
> --- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
> +++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c
> @@ -247,8 +247,10 @@ mtk_wed_get_memory_region(struct mtk_wed_hw *hw, const char *name,
> region->phy_addr = res.start;
> region->size = resource_size(&res);
> region->addr = devm_ioremap_resource(hw->dev, &res);
> + if (IS_ERR(region->addr))
> + return PTR_ERR(region->addr);
>
> - return !region->addr ? -EINVAL : 0;
> + return 0;
> }
>
> static int
> --
> 2.47.2
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region()
2025-07-15 23:01 [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region() Dan Carpenter
2025-07-16 7:21 ` Lorenzo Bianconi
@ 2025-07-18 2:00 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: patchwork-bot+netdevbpf @ 2025-07-18 2:00 UTC (permalink / raw)
To: Dan Carpenter
Cc: robh, nbd, sean.wang, lorenzo, andrew+netdev, davem, edumazet,
kuba, pabeni, matthias.bgg, angelogioacchino.delregno, netdev,
linux-kernel, linux-arm-kernel, linux-mediatek, kernel-janitors
Hello:
This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Tue, 15 Jul 2025 18:01:19 -0500 you wrote:
> We recently changed this from using devm_ioremap() to using
> devm_ioremap_resource() and unfortunately the former returns NULL while
> the latter returns error pointers. The check for errors needs to be
> updated as well.
>
> Fixes: e27dba1951ce ("net: Use of_reserved_mem_region_to_resource{_byname}() for "memory-region"")
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
>
> [...]
Here is the summary with links:
- [net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region()
https://git.kernel.org/netdev/net-next/c/c2fe3b2a7c71
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-07-15 23:01 [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region() Dan Carpenter
2025-07-16 7:21 ` Lorenzo Bianconi
2025-07-18 2:00 ` patchwork-bot+netdevbpf
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