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From: Simon Horman <horms@kernel.org>
To: Yeounsu Moon <yyyynoom@gmail.com>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net v2] net: dlink: handle dma_map_single() failure properly
Date: Fri, 10 Oct 2025 07:55:15 +0100	[thread overview]
Message-ID: <20251010065515.GA3115768@horms.kernel.org> (raw)
In-Reply-To: <20251009155715.1576-2-yyyynoom@gmail.com>

On Fri, Oct 10, 2025 at 12:57:16AM +0900, Yeounsu Moon wrote:
> There is no error handling for `dma_map_single()` failures.
> 
> Add error handling by checking `dma_mapping_error()` and freeing
> the `skb` using `dev_kfree_skb()` (process context) when it fails.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Yeounsu Moon <yyyynoom@gmail.com>
> Tested-on: D-Link DGE-550T Rev-A3
> Suggested-by: Simon Horman <horms@kernel.org>

FWIIW, I don't think my Suggested-by tag is strictly necessary here. I did
suggest an implementation approach. And I'm very happy that you took my
idea on board. But I'd view as more of a tweak in this case. Because the
overall meaning of the patch remains the same as your original version.

> ---
> Changelog:
> v2:
> - fix one thing properly
> - use goto statement, per Simon's suggestion
> v1: https://lore.kernel.org/netdev/20251002152638.1165-1-yyyynoom@gmail.com/

Thanks for the update, this version looks good to me.

Reviewed-by: Simon Horman <horms@kernel.org>

  reply	other threads:[~2025-10-10  6:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-09 15:57 [PATCH net v2] net: dlink: handle dma_map_single() failure properly Yeounsu Moon
2025-10-10  6:55 ` Simon Horman [this message]
2025-10-10 16:09   ` Yeounsu Moon
2025-10-12 18:10 ` patchwork-bot+netdevbpf

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