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q88mr713026pja.134.1571966581274; Thu, 24 Oct 2019 18:23:01 -0700 (PDT) Received: from [10.61.2.175] ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id t4sm71433pjo.26.2019.10.24.18.22.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 24 Oct 2019 18:23:00 -0700 (PDT) Subject: Re: [PATCH v6 20/30] powerpc/pci: Fix crash with enabled movable BARs To: Sergey Miroshnichenko , linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: Bjorn Helgaas , linux@yadro.com, Oliver O'Halloran , Sam Bobroff References: <20191024171228.877974-1-s.miroshnichenko@yadro.com> <20191024171228.877974-21-s.miroshnichenko@yadro.com> From: Alexey Kardashevskiy Autocrypt: addr=aik@ozlabs.ru; keydata= mQINBE+rT0sBEADFEI2UtPRsLLvnRf+tI9nA8T91+jDK3NLkqV+2DKHkTGPP5qzDZpRSH6mD EePO1JqpVuIow/wGud9xaPA5uvuVgRS1q7RU8otD+7VLDFzPRiRE4Jfr2CW89Ox6BF+q5ZPV /pS4v4G9eOrw1v09lEKHB9WtiBVhhxKK1LnUjPEH3ifkOkgW7jFfoYgTdtB3XaXVgYnNPDFo PTBYsJy+wr89XfyHr2Ev7BB3Xaf7qICXdBF8MEVY8t/UFsesg4wFWOuzCfqxFmKEaPDZlTuR 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c7E5M+/NpslPCmYnDjs5qg0/3ihh6XuOGggZQOqrYPC3PnsNs3NxirwOkVPQgO6mXxpuifvJ DG9EMkK8IBXnLulqVk54kf7fE0jT/d8RTtJIA92GzsgdK2rpT1MBKKVffjRFGwN7nQVOzi4T XrB5p+6ML7Bd84xOEGsj/vdaXmz1esuH7BOZAGEZfLRCHJ0GVCSssg== Message-ID: Date: Fri, 25 Oct 2019 12:22:55 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: <20191024171228.877974-21-s.miroshnichenko@yadro.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 25/10/2019 04:12, Sergey Miroshnichenko wrote: > Add a check for the UNSET resource flag to skip the released BARs Where/why does it crash exactly? It is not extremely clear from the code. Thanks, > > CC: Alexey Kardashevskiy > CC: Oliver O'Halloran > CC: Sam Bobroff > Signed-off-by: Sergey Miroshnichenko > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c > index c28d0d9b7ee0..33d5ed8c258f 100644 > --- a/arch/powerpc/platforms/powernv/pci-ioda.c > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c > @@ -2976,7 +2976,8 @@ static void pnv_ioda_setup_pe_res(struct pnv_ioda_pe *pe, > int index; > int64_t rc; > > - if (!res || !res->flags || res->start > res->end) > + if (!res || !res->flags || res->start > res->end || > + (res->flags & IORESOURCE_UNSET)) > return; > > if (res->flags & IORESOURCE_IO) { > -- Alexey