linux-kernel - Re: [PATCH Part1 v5 35/38] x86/sev: Register SNP guest request platform device

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Message-ID: <ada086eb-2a27-ff25-6db1-3d629cb31868@amd.com>
Date:   Tue, 31 Aug 2021 11:03:10 -0500
From:   Brijesh Singh <brijesh.singh@....com>
To:     Dov Murik <dovmurik@...ux.ibm.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-coco@...ts.linux.dev, linux-mm@...ck.org
Cc:     brijesh.singh@....com, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Joerg Roedel <jroedel@...e.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        "H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Sergio Lopez <slp@...hat.com>, Peter Gonda <pgonda@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Borislav Petkov <bp@...en8.de>,
        Michael Roth <michael.roth@....com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Andi Kleen <ak@...ux.intel.com>, tony.luck@...el.com,
        marcorr@...gle.com, sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: Re: [PATCH Part1 v5 35/38] x86/sev: Register SNP guest request
 platform device

Hi Dov,


On 8/31/21 6:37 AM, Dov Murik wrote:
>> +
>> +	if (!platform_device_register(&guest_req_device))
>> +		dev_info(&guest_req_device.dev, "secret phys 0x%llx\n", snp_secrets_phys);
> 
> Should you return the error code from platform_device_register() in case
> it fails (returns something other than zero)?
> 

Yes, I will fix it in next rev. Will return a non-zero on failure to 
register the device.

thanks