linux-kernel - Re: [PATCH v1 1/1] spi: Remove unneded check for orig

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Message-ID: <d8930bce-6db6-45f4-8f09-8a00fa48e607@notapiano>
Date: Wed, 15 May 2024 17:09:33 -0400
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/1] spi: Remove unneded check for orig_nents

On Tue, May 07, 2024 at 11:10:27PM +0300, Andy Shevchenko wrote:
> Both dma_unmap_sgtable() and sg_free_table() in spi_unmap_buf_attrs()
> have checks for orig_nents against 0. No need to duplicate this.
> All the same applies to other DMA mapping API calls.
> 
> Also note, there is no other user in the kernel that does this kind of
> checks.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Hi,

this commit caused a regression which I reported here:

https://lore.kernel.org/all/d3679496-2e4e-4a7c-97ed-f193bd53af1d@notapiano

along with some thoughts on the cause and a possible solution, though I'm not
familiar with this code base at all and would really appreciate any feedback you
may have.

Thanks,
Nícolas