linux-kernel - Re: [PATCH v2 1/2] hwtracing: hisi_ptt: Only add the supported devices to the filters list

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Message-ID: <20230110150510.GA1502847@bhelgaas>
Date:   Tue, 10 Jan 2023 09:05:10 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Yicong Yang <yangyicong@...wei.com>
Cc:     suzuki.poulose@....com, mathieu.poirier@...aro.org,
        jonathan.cameron@...wei.com, linux-kernel@...r.kernel.org,
        alexander.shishkin@...ux.intel.com, linux-pci@...r.kernel.org,
        prime.zeng@...wei.com, linuxarm@...wei.com,
        Yicong Yang <yangyicong@...ilicon.com>
Subject: Re: [PATCH v2 1/2] hwtracing: hisi_ptt: Only add the supported
 devices to the filters list

On Tue, Jan 10, 2023 at 09:08:32PM +0800, Yicong Yang wrote:
> From: Yicong Yang <yangyicong@...ilicon.com>
> 
> The PTT device can only support the devices on the same PCIe core,
> within BDF range [lower_bdf, upper_bdf]. It's not correct to assume
> the devices on the root bus are from the same PCIe core, there are
> cases that root ports from different PCIe core are sharing the same
> bus. So add the checking when initialize the filters list.

"So check when initializing the filters list."