linux-kernel - Re: [PATCH] iommu/omap: Use int type to store negative error codes

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Message-ID: <aLrehYcpQcmmuKPR@8bytes.org>
Date: Fri, 5 Sep 2025 14:58:45 +0200
From: Joerg Roedel <joro@...tes.org>
To: Qianfeng Rong <rongqianfeng@...o.com>
Cc: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
	iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/omap: Use int type to store negative error codes

On Fri, Aug 29, 2025 at 10:02:19PM +0800, Qianfeng Rong wrote:
> Change the 'ret' variable from u32 to int to store negative error codes
> or zero;
> 
> Storing the negative error codes in unsigned type, doesn't cause an issue
> at runtime but it's ugly. Additionally, assigning negative error codes to
> unsigned type may trigger a GCC warning when the -Wsign-conversion flag
> is enabled.
> 
> No effect on runtime.
> 
> Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
> ---
>  drivers/iommu/omap-iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.