Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH] media: tw9910: add missed clk_disable_unprepare() on
 failure path
To:     Jacopo Mondi <jacopo@jmondi.org>
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        Jacopo Mondi <jacopo+renesas@jmondi.org>,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        ldv-project@linuxtesting.org
References: <1546119320-11841-1-git-send-email-khoroshilov@ispras.ru>
 <20181230094918.6ysahn7tr6us6uoh@uno.localdomain>
From:   Alexey Khoroshilov <khoroshilov@ispras.ru>
Openpgp: preference=signencrypt
Autocrypt: addr=khoroshilov@ispras.ru; prefer-encrypt=mutual; keydata=
 mQINBFtq9eIBEACxmOIPDht+aZvO9DGi4TwnZ1WTDnyDVz3Nnh0rlQCK8IssaT6wE5a95VWo
 iwOWalcL9bJMHQvw60JwZKFjt9oH2bov3xzx/JRCISQB4a4U1J/scWvPtabbB3t+VAodF5KZ
 vZ2gu/Q/Wa5JZ9aBH0IvNpBAAThFg1rBXKh7wNqrhsQlMLg+zTSK6ZctddNl6RyaJvAmbaTS
 sSeyUKXiabxHn3BR9jclXfmPLfWuayinBvW4J3vS+bOhbLxeu3MO0dUqeX/Nl8EAhvzo0I2d
 A0vRu/Ze1wU3EQYT6M8z3i1b3pdLjr/i+MI8Rgijs+TFRAhxRw/+0vHGTg6Pn02t0XkycxQR
 mhH3v0kVTvMyM7YSI7yXvd0QPxb1RX9AGmvbJu7eylzcq9Jla+/T3pOuWsJkbvbvuFKKmmYY
 WnAOR7vu/VNVfiy4rM0bfO14cIuEG+yvogcPuMmQGYu6ZwS9IdgZIOAkO57M/6wR0jIyfxrG
 FV3ietPtVcqeDVrcShKyziRLJ+Xcsg9BLdnImAqVQomYr27pyNMRL5ILuT7uOuAQPDKBksK+
 l2Fws0d5iUifqnXSPuYxqgS4f8SQLS7ECxvCGVVbkEEng9vkkmyrF6wM86BZ9apPGDFbopiK
 7GRxQtSGszVv83abaVb8aDsAudJIp7lLaIuXLZAe1r+ycYpEtQARAQABtCpBbGV4ZXkgS2hv
 cm9zaGlsb3YgPGtob3Jvc2hpbG92QGlzcHJhcy5ydT6JAj0EEwEIACcFAltq9eICGwMFCRLM
 AwAFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQ2B/JSzCwrEWLaA/+NFZfyhU0vJzFtYsk
 yaqx8nWZLrAoUK7VcobH0lJH6lfGbarO5JpENaIiTP12YZ4xO+j3GGJtLy2gvnpypGnxmiAl
 RqPt7WeAIj6oqPrUs2QF7i4SOiPtku/NrysI1zHzlA8yqUduBtam5rdQeLRNCJiEED1fU8sp
 +DgJBN/OHEDyAag2hu1KFKWuPfQ+QGpXYZb+1NW/hKwvvwCNVyypELAfFnkketFXjIMwHnL8
 ZPqJZlkvkpxuRXOaXPL9NFhZnC/WS+NJ81L3pr+w6eo3xTPYZvRW8glvqlEDgHqr3uMGIaes
 nwfRXLHp+TC1ht6efCXzdPyMZ1E7HXQN9foKisI1V5iQFhN+CT3dbsguQI4e10F5ql0TZUJY
 SMzvY0eObs6TWRdD/Ha7Y5rLmZ54R9sxumpZNcJzktfgm9f0XfeqVEJUn/40MRDD+l2W12Db
 Jkko+sbtAEw+f+/j3uz8xOE+Uv4kwFC5a6JKgdX88oigHnpAs3FvffP594Loi3ibFrQUW5wH
 bXh5Ni+l1GKEQ0PHMk+KQQT9L2r9s7C0Nh8XzwdpOshZWsrNSZqcG+01wrmUhyX2uSaoZ07I
 /+KZURlMSqI71X6lkMWlB3SyThvYhHgnR0EGGTerwM1MaVjHN+Z6lPmsKNxG8lzCeWeZ6peA
 c5oUHV4WQ8Ux9BM8saK5Ag0EW2r14gEQAMz+5u+X7j1/dT4WLVRQaE1Shnd2dKBn2E7fgo/N
 4JIY6wHD/DJoWYQpCJjjvBYSonvQsHicvDW8lPh2EXgZ9Fi8AHKT2mVPitVy+uhfWa/0FtsC
 e3hPfrjTcN7BUcXlIjmptxIoDbvQrNfIWUGdWiyDj4EDfABW/kagXqaBwF2HdcDaNDGggD1c
 DglA0APjezIyTGnGMKsi5QSSlOLm8OZEJMj5t+JL6QXrruijNb5Asmz5mpRQrak7DpGOskjK
 fClm/0oy2zDvWuoXJa+dm3YFr43V+c5EIMA4LpGk63Eg+5NltQ/gj0ycgD5o6reCbjLz4R9D
 JzBezK/KOQuNG5qKUTMbOHWaApZnZ6BDdOVflkV1V+LMo5GvIzkATNLm/7Jj6DmYmXbKoSAY
 BKZiJWqzNsL1AJtmJA1y5zbWX/W4CpNs8qYMYG8eTNOqunzopEhX7T0cOswcTGArZYygiwDW
 BuIS83QRc7udMlQg79qyMA5WqS9g9g/iodlssR9weIVoZSjfjhm5NJ3FmaKnb56h6DSvFgsH
 xCa4s1DGnZGSAtedj8E3ACOsEfu4J/WqXEmvMYNBdGos2YAc+g0hjuOB10BSD98d38xP1vPc
 qNrztIF+TODAl1dNwU4rCSdGQymsrMVFuXnHMH4G+dHvMAwWauzDbnILHAGFyJtfxVefABEB
 AAGJAiUEGAEIAA8FAltq9eICGwwFCRLMAwAACgkQ2B/JSzCwrEU3Rg//eFWHXqTQ5CKw4KrX
 kTFxdXnYKJ5zZB0EzqU6m/FAV7snmygFLbOXYlcMW2Fh306ivj9NKJrlOaPbUzzyDf8dtDAg
 nSbH156oNJ9NHkz0mrxFMpJA2E5AUemOFx57PUYt93pR2B7bF2zGua4gMC+vorDQZjX9kvrL
 Kbenh3boFOe1tUaiRRvEltVFLOg+b+CMkKVbLIQe/HkyKJH5MFiHAF7QxnPHaxyO7QbWaUmF
 6BHVujxAGvNgkrYJb6dpiNNZSFNRodaSToU5oM+z1dCrNNtN3u4R7AYr6DDIDxoSzR4k0ZaG
 uSeqh4xxQCD7vLT3JdZDyhYUJgy9mvSXdkXGdBIhVmeLch2gaWNf5UOutVJwdPbIaUDRjVoV
 Iw6qjKq+mnK3ttuxW5Aeg9Y1OuKEvCVu+U/iEEJxx1JRmVAYq848YqtVPY9DkZdBT4E9dHqO
 n8lr+XPVyMN6SBXkaR5tB6zSkSDrIw+9uv1LN7QIri43fLqhM950ltlveROEdLL1bI30lYO5
 J07KmxgOjrvY8X9WOC3O0k/nFpBbbsM4zUrmF6F5wIYO99xafQOlfpUnVtbo3GnBR2LIcPYj
 SyY3dW28JXo2cftxIOr1edJ+fhcRqYRrPzJrQBZcE2GZjRO8tz6IOMAsc+WMtVfj5grgVHCu
 kK2E04Fb+Zk1eJvHYRc=
Message-ID: <80f84853-9991-8a64-da22-9349543d5deb@ispras.ru>
Date:   Sun, 30 Dec 2018 14:17:54 +0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.2.1
MIME-Version: 1.0
In-Reply-To: <20181230094918.6ysahn7tr6us6uoh@uno.localdomain>
Content-Type: text/plain; charset=utf-8
Content-Language: ru-RU
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Jacopo,

On 30.12.2018 12:49, Jacopo Mondi wrote:
> On Sun, Dec 30, 2018 at 12:35:20AM +0300, Alexey Khoroshilov wrote:
>> If gpiod_get_optional() fails in tw9910_power_on(), clk is left undisabled.
> 
> Correct, thanks for spotting this.
> 
> I think pdn_gpio should also be handled if rstb_gpio fails.
> What's your opinion?

I would agree. I'll send v2.

Thank you,
Alexey

> 
>> Found by Linux Driver Verification project (linuxtesting.org).
>>
>> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
>> ---
>>  drivers/media/i2c/tw9910.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/media/i2c/tw9910.c b/drivers/media/i2c/tw9910.c
>> index a54548cc4285..109770d678d2 100644
>> --- a/drivers/media/i2c/tw9910.c
>> +++ b/drivers/media/i2c/tw9910.c
>> @@ -610,6 +610,7 @@ static int tw9910_power_on(struct tw9910_priv *priv)
>>  					     GPIOD_OUT_LOW);
>>  	if (IS_ERR(priv->rstb_gpio)) {
>>  		dev_info(&client->dev, "Unable to get GPIO \"rstb\"");
>> +		clk_disable_unprepare(priv->clk);
>>  		return PTR_ERR(priv->rstb_gpio);
>>  	}
>>
>> --
>> 2.7.4
>>