linux-kernel - Re: [PATCH] iio: Fix uninitialized symbol 'ret'

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Message-ID: <0c616d01-f90b-472b-bddf-d4441e9159e4@gmail.com>
Date: Sat, 2 Nov 2024 11:45:13 +0200
From: Matti Vaittinen <mazziesaccount@...il.com>
To: Zicheng Qu <quzicheng@...wei.com>, linux-iio@...r.kernel.org,
 linux-kernel@...r.kernel.org
Cc: tanghui20@...wei.com, zhangqiao22@...wei.com, judy.chenhui@...wei.com
Subject: Re: [PATCH] iio: Fix uninitialized symbol 'ret'

On 01/11/2024 05:43, Zicheng Qu wrote:
> Hi Matti,
> 
> It might be better but I am not pretty sure whether have to have both 
> gains and times, so I modified 'ret' in places where issues might arise, 
> rather than adding a restriction in iio_gts_sanity_check().

Yes. Thanks for the fix.
> 
> In the corner case, there is a restriction that both num_hwgain and 
> num_itime cannot be 0 simultaneously in the iio_gts_sanity_check(). 

Right. Having both 0 would mean there was nothing at all to handle for 
the GTS.

> However, in the gain_to_scaletables() , if num_itime is 1 and num_hwgain 
> is 0, the 'gain_bytes' becomes 0 and 'all_gains' is not null after the 
> 'for' loop, which causes the subsequent 'while' or 'for' to become 
> ineffective, leading to an undefined 'ret' being returned in the 
> 'free_out'.

Yes. Thank you for the fix :)

Yours,
     -- Matti