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From: Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
To: <linuxppc-dev@lists.ozlabs.org>, <linux-pci@vger.kernel.org>
Cc: Oliver O'Halloran <oohall@gmail.com>,
	Stewart Smith <stewart@linux.vnet.ibm.com>,
	Alexey Kardashevskiy <aik@ozlabs.ru>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Russell Currey <ruscur@russell.cc>, <linux@yadro.com>,
	Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
Subject: [PATCH v5 4/8] powerpc/pci: Reduce code duplication in pci_add_device_node_info
Date: Mon, 11 Mar 2019 14:52:29 +0300
Message-ID: <20190311115233.6514-5-s.miroshnichenko@yadro.com> (raw)
In-Reply-To: <20190311115233.6514-1-s.miroshnichenko@yadro.com>

It is possible now to allocate and fill a new pdn with add_one_dev_pci_data

Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko@yadro.com>
---
 arch/powerpc/kernel/pci_dn.c | 38 +++++++++++++++---------------------
 1 file changed, 16 insertions(+), 22 deletions(-)

diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index b594b055b2cf..7f12882d8882 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -159,22 +159,20 @@ static struct pci_dn *pci_alloc_pdn(struct pci_dn *parent,
 {
 	struct pci_dn *pdn;
 
-	/* Except PHB, we always have the parent */
-	if (!parent)
-		return NULL;
-
 	pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
 	if (!pdn)
 		return NULL;
 
-	pdn->phb = parent->phb;
 	pdn->parent = parent;
 	pdn->busno = busno;
 	pdn->devfn = devfn;
 	pdn->pe_number = IODA_INVALID_PE;
 	INIT_LIST_HEAD(&pdn->child_list);
 	INIT_LIST_HEAD(&pdn->list);
-	list_add_tail(&pdn->list, &parent->child_list);
+	if (parent) {
+		pdn->phb = parent->phb;
+		list_add_tail(&pdn->list, &parent->child_list);
+	}
 
 	return pdn;
 }
@@ -341,25 +339,29 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
 	const __be32 *regs;
 	struct device_node *parent;
 	struct pci_dn *pdn;
+	int busno = 0, devfn = 0;
 #ifdef CONFIG_EEH
 	struct eeh_dev *edev;
 #endif
 
-	pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
-	if (pdn == NULL)
-		return NULL;
-	dn->data = pdn;
-	pdn->phb = hose;
-	pdn->pe_number = IODA_INVALID_PE;
 	regs = of_get_property(dn, "reg", NULL);
 	if (regs) {
 		u32 addr = of_read_number(regs, 1);
 
 		/* First register entry is addr (00BBSS00)  */
-		pdn->busno = (addr >> 16) & 0xff;
-		pdn->devfn = (addr >> 8) & 0xff;
+		busno = (addr >> 16) & 0xff;
+		devfn = (addr >> 8) & 0xff;
 	}
 
+	parent = of_get_parent(dn);
+	pdn = pci_alloc_pdn(parent ? PCI_DN(parent) : NULL,
+			    busno, devfn);
+	if (!pdn)
+		return NULL;
+
+	dn->data = pdn;
+	pdn->phb = hose;
+
 	/* vendor/device IDs and class code */
 	regs = of_get_property(dn, "vendor-id", NULL);
 	pdn->vendor_id = regs ? of_read_number(regs, 1) : 0;
@@ -380,14 +382,6 @@ struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
 	}
 #endif
 
-	/* Attach to parent node */
-	INIT_LIST_HEAD(&pdn->child_list);
-	INIT_LIST_HEAD(&pdn->list);
-	parent = of_get_parent(dn);
-	pdn->parent = parent ? PCI_DN(parent) : NULL;
-	if (pdn->parent)
-		list_add_tail(&pdn->list, &pdn->parent->child_list);
-
 	return pdn;
 }
 EXPORT_SYMBOL_GPL(pci_add_device_node_info);
-- 
2.20.1


  parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-11 11:52 [PATCH v5 0/8] powerpc/powernv/pci: Make hotplug self-sufficient, independent of FW and DT Sergey Miroshnichenko
2019-03-11 11:52 ` [PATCH v5 1/8] powerpc/pci: Access PCI config space directly w/o pci_dn Sergey Miroshnichenko
2019-04-30  4:22   ` Oliver
2019-03-11 11:52 ` [PATCH v5 2/8] powerpc/powernv/pci: Suppress an EEH error when reading an empty slot Sergey Miroshnichenko
2019-04-30  4:26   ` Oliver
2019-03-11 11:52 ` [PATCH v5 3/8] powerpc/pci: Create pci_dn on demand Sergey Miroshnichenko
2019-03-11 11:52 ` Sergey Miroshnichenko [this message]
2019-03-11 11:52 ` [PATCH v5 5/8] powerpc/pci/IOV: Add support for runtime enabling the VFs Sergey Miroshnichenko
2019-04-30  6:00   ` Oliver O'Halloran
2019-05-14 14:44     ` Sergey Miroshnichenko
2019-03-11 11:52 ` [PATCH v5 6/8] powerpc/pci: Don't rely on DT is the PCI_REASSIGN_ALL_BUS is set Sergey Miroshnichenko
2019-03-11 11:52 ` [PATCH v5 7/8] powerpc/powernv/pci: Hook up the writes to PCI_SECONDARY_BUS register Sergey Miroshnichenko
2019-03-11 11:52 ` [PATCH v5 8/8] powerpc/powernv/pci: Enable reassigning the bus numbers Sergey Miroshnichenko
2019-03-27 14:10 ` [PATCH v5 0/8] powerpc/powernv/pci: Make hotplug self-sufficient, independent of FW and DT Bjorn Helgaas
2019-03-28 12:44   ` Oliver

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