linux-kernel - Re: TI: X15 the connected SSD is not detected on Linux next 20221006 tag

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Message-Id: <98670e23-6553-4788-8662-9403c480af82@app.fastmail.com>
Date:   Mon, 05 Dec 2022 11:08:22 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Serge Semin" <fancer.lancer@...il.com>,
        "Anders Roxell" <anders.roxell@...aro.org>
Cc:     "Niklas Cassel" <Niklas.Cassel@....com>,
        "Naresh Kamboju" <naresh.kamboju@...aro.org>,
        "Praneeth Bajjuri" <praneeth@...com>,
        "Serge Semin" <Sergey.Semin@...kalelectronics.ru>,
        "Damien Le Moal" <damien.lemoal@...nsource.wdc.com>,
        "open list" <linux-kernel@...r.kernel.org>,
        "Linux ARM" <linux-arm-kernel@...ts.infradead.org>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" 
        <linux-ide@...r.kernel.org>,
        "lkft-triage@...ts.linaro.org" <lkft-triage@...ts.linaro.org>,
        "Lukas Bulwahn" <lukas.bulwahn@...il.com>,
        "Carlos Hernandez" <ceh@...com>,
        "Sumit Semwal" <sumit.semwal@...aro.org>
Subject: Re: TI: X15 the connected SSD is not detected on Linux next 20221006 tag

On Mon, Dec 5, 2022, at 02:11, Serge Semin wrote:
> On Thu, Dec 01, 2022 at 12:48:32PM +0100, Anders Roxell wrote:

>> 
>>   for (i = 0; i < hpriv->n_clks; i++) {
>> - if (!strcmp(hpriv->clks[i].id, con_id))
>> + if (hpriv->clks && hpriv->clks[i].id &&
>> +    !strcmp(hpriv->clks[i].id, con_id))
>>   return hpriv->clks[i].clk;
>>   }
>
> Indeed I should have taken into account that devm_clk_bulk_get_all()
> can get unnamed clocks too. But checking the hpriv->clks pointer for
> being not null is redundant, since the ahci_platform_get_resources()
> procedure makes sure that the array is always allocated. At the very
> least you shouldn't check the pointer in the loop, but can make sure
> that the clks array is available before it.

Do you think this is otherwise the correct fix then? Any chance we
can still get a version of it into 6.1?

     Arnd