linux-kernel - Re: [PATCH] spi:pic32: Fix missing error code 'ret' in the failure path

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Date:   Sat, 13 May 2023 18:14:01 +0300
From:   andy.shevchenko@...il.com
To:     Sukrut Bellary <sukrut.bellary@...ux.com>
Cc:     Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi:pic32: Fix missing error code 'ret' in the failure
 path

Sat, May 13, 2023 at 05:26:53AM -0700, Sukrut Bellary kirjoitti:
> smatch warning -
> drivers/spi/spi-pic32.c:634 pic32_spi_dma_prep() warn: missing error code 'ret'
> 
> Currently in case of pic32_spi_dma_config() failure, SUCCESS is returned.
> Capture and return the error code in the failure path.

The comment above the pic32_spi_dma_config() call on the caller side suggests
that DMA is optional. With that in mind the current code won't prevent us from
using the driver in PIO mode.

> This is based on static analysis only. Compilation tested.

That's why I think it's incorrect fix. You need to fix smatch.

-- 
With Best Regards,
Andy Shevchenko