linux-kernel - RE: [PATCH] regulator: da9121: Fix uninit-value in da9121_assign_chip

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Date:   Thu, 21 Apr 2022 09:24:50 +0000
From:   Adam Ward <Adam.Ward.opensource@...semi.com>
To:     Wei Yongjun <weiyongjun1@...wei.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Support Opensource <Support.Opensource@...semi.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Adam Ward <Adam.Ward.opensource@...semi.com>,
        Hulk Robot <hulkci@...wei.com>
Subject: RE: [PATCH] regulator: da9121: Fix uninit-value in
 da9121_assign_chip_model()

On 21 April 2022 10:04, Wei Yongjun wrote:

> This happend when da9121 device is probe by da9121_i2c_id, but with
> invalid dts. Thus, chip->subvariant_id is set to -EINVAL, and later
> da9121_assign_chip_model() will access 'regmap' without init it.
> 
> Fix it by return -EINVAL from da9121_assign_chip_model() if
> 'chip->subvariant_id' is invalid.
> 
> Fixes: f3fbd5566f6a ("regulator: da9121: Add device variants")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>

Reviewed-by: Adam Ward <Adam.Ward.Opensource@...semi.com>