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Wed, 13 Feb 2019 07:38:58 -0600 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE108.ent.ti.com (10.64.6.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Wed, 13 Feb 2019 07:38:58 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Wed, 13 Feb 2019 07:38:58 -0600 Received: from [172.24.190.233] (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x1DDcr1U032003; Wed, 13 Feb 2019 07:38:54 -0600 Subject: Re: [PATCH 11/15] PCI: pci-epf-test: Use pci_epc_get_features to get EPC features To: Lorenzo Pieralisi References: <20190107064148.10152-1-kishon@ti.com> <20190107064148.10152-12-kishon@ti.com> <20190212150718.GA28306@e107981-ln.cambridge.arm.com> From: Kishon Vijay Abraham I Message-ID: <6d72cfdf-97a7-4aab-f746-d0e545431ea2@ti.com> Date: Wed, 13 Feb 2019 19:08:18 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190212150718.GA28306@e107981-ln.cambridge.arm.com> Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190213_053907_461446_E5BAA184 X-CRM114-Status: GOOD ( 20.69 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Heiko Stuebner , Gustavo Pimentel , Shawn Lin , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Alan Douglas , Jia-Ju Bai , Cyrille Pitchen , Jingoo Han , Bjorn Helgaas , linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Lorenzo, On 12/02/19 8:37 PM, Lorenzo Pieralisi wrote: > On Mon, Jan 07, 2019 at 12:11:44PM +0530, Kishon Vijay Abraham I wrote: > > [...] > >> static int pci_epf_test_bind(struct pci_epf *epf) >> { >> int ret; >> struct pci_epf_test *epf_test = epf_get_drvdata(epf); >> struct pci_epf_header *header = epf->header; >> + const struct pci_epc_features *epc_features; >> + enum pci_barno test_reg_bar = BAR_0; >> struct pci_epc *epc = epf->epc; >> struct device *dev = &epf->dev; >> + bool linkup_notifier = false; >> + bool msix_capable = false; >> + bool msi_capable = true; >> >> if (WARN_ON_ONCE(!epc)) >> return -EINVAL; >> >> - if (epc->features & EPC_FEATURE_NO_LINKUP_NOTIFIER) >> - epf_test->linkup_notifier = false; >> - else >> - epf_test->linkup_notifier = true; >> - >> - epf_test->msix_available = epc->features & EPC_FEATURE_MSIX_AVAILABLE; >> + epc_features = pci_epc_get_features(epc, epf->func_no); > > I think it would work out better if struct pci_epc_features was > allocated in the caller (stack) and pci_epc_get_features() take a > pointer parameter to it rather than the callee and the callee would just > have to fill it out, this also removes data in the driver that is not > really useful. > > Is there any other reason behind the current design choice ? Some drivers are used by multiple platforms each with different features. In such cases it's cleaner to have separate epc_feature table for each platform. I think the driver should maintain some sort of data to even populate pci_epc_features allocated by EP function driver. Thanks Kishon _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel