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Date: Wed, 8 Apr 2026 14:40:09 -0500
From: Bjorn Helgaas <helgaas@kernel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Cc: Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kwilczynski@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>,
	Shuah Khan <shuah@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Koichiro Den <den@valinux.co.jp>, Niklas Cassel <cassel@kernel.org>,
	Christian Bruel <christian.bruel@foss.st.com>,
	fabrice.gasnier@foss.st.com, linux-pci@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	Frank Li <Frank.Li@nxp.com>
Subject: Re: [PATCH v4 0/3] Skip subrange map tests on DWC iATU allocation
 failure
Message-ID: <20260408194009.GA308328@bhelgaas>
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In-Reply-To: <177557111043.286575.12032515827207230571.b4-ty@b4>

On Tue, Apr 07, 2026 at 07:41:50PM +0530, Manivannan Sadhasivam wrote:
> On Tue, 07 Apr 2026 14:04:07 +0200, Christian Bruel wrote:
> > For platforms with a limited iATU inbound window entries, pci_epc_set_bar()
> > might fail to allocate the ATU entries for subrange maps requiring more
> > than 1 slot.
> > For the dwc controller, this failure is reported with -ENOSPC in
> > dw_pcie_ep_set_bar(). In this case, the epf test cannot be run and needs
> > to be skipped.
> > 
> > [...]
> 
> Applied, thanks!
> 
> [1/3] PCI: endpoint: pci-epf-test: Handle -ENOSPC in subrange_setup
>       commit: dfac277624c82b361dbb3e0fc57f577a270bebbb
> [2/3] misc: pci_endpoint_test: Handle -ENOSPC in subrange mapping test case
>       commit: a51c75fc48c2a0d2ead2d7e8c521de0423ec8dec
> [3/3] selftests: pci_endpoint: Skip BAR subrange test on -ENOSPC
>       commit: 2b729b7721bd4d0640b26790ea6c360c85a4af8c

I squashed these together because they need to be understood together.

I'm missing the details, but it seems unfortunate that the COMMAND_*,
STATUS_*, and CAP_* definitions have to be duplicated and presumably
kept in sync in drivers/misc/pci_endpoint_test.c and
drivers/pci/endpoint/functions/pci-epf-test.c.