linux-kernel - Re: [PATCH] hte: tegra: Fix missing error code in tegra_hte_test

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Date:   Thu, 26 Oct 2023 16:04:56 -0700
From:   Dipen Patel <dipenp@...dia.com>
To:     Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        timestamp@...ts.linux.dev, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com
Subject: Re: [PATCH] hte: tegra: Fix missing error code in
 tegra_hte_test_probe()

On 10/26/23 12:53 AM, Harshit Mogalapalli wrote:
> The value of 'ret' is zero when of_hte_req_count() fails to get number
> of entitties to timestamp. And returning success(zero) on this failure
> path is incorrect.
> 
> Fixes: 9a75a7cd03c9 ("hte: Add Tegra HTE test driver")
> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
> ---
> This is found using static analysis with smatch, only compile tested.
> ---
>  drivers/hte/hte-tegra194-test.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hte/hte-tegra194-test.c b/drivers/hte/hte-tegra194-test.c
> index ba37a5efbf82..ab2edff018eb 100644
> --- a/drivers/hte/hte-tegra194-test.c
> +++ b/drivers/hte/hte-tegra194-test.c
> @@ -153,8 +153,10 @@ static int tegra_hte_test_probe(struct platform_device *pdev)
>  	}
>  
>  	cnt = of_hte_req_count(hte.pdev);
> -	if (cnt < 0)
> +	if (cnt < 0) {
> +		ret = cnt;
>  		goto free_irq;
> +	}
>  
>  	dev_info(&pdev->dev, "Total requested lines:%d\n", cnt);
>  
Reviewed-by: Dipen Patel <dipenp@...dia.com>